Of all mammals, humans produce most sweat AFAWK.
Montagna (1965):
Sweating is an enigma that amounts to a major biological blunder:
it depletes the body not only of water, but also of sodium & other essential electrolytes:
why did our supposed savanna ancestors lose their protective fur, but develop thermo-active sweat-glands?

Many small mammals (rodents, marsupials, cats...) do not sweat thermoactively, but salivate:
- they spread saliva over a less-haired part of the skin, the saliva evaporates, and cools the body,
- or they pant, just as most larger mammals like sheep or dogs.

The costs and benefits of salivation, panting & sweating for mammals of different size, habitats & lifestyles are not clear yet (Schmidt-Nielsen 1979:viii).
African hunting-dogs sweat nor pant nor salivate, but like all savanna mammals, they tolerate much higher body Tps (which saves a lot of water),
and they usu.rest in holes during the day.
Some larger mammals like camels, bovids, equids & OW-monkeys have somewhat larger water losses through their skin when they are overheated (through apocrine glands, not through eccrine glands as in humans),
but their maximal water losses per surface of skin are always much smaller than in humans (Schmidt-Nielsen 1979:54,73,83).

Fur-seals are the only the mammals that sweat thermo-actively through abundant eccrine glands (on their naked hind flippers) when they are overheated on land (McFarland cs 1979:773).

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

[email protected] wrote:


Human sweating is for dry, not humid, conditions.



https://en.m.wikipedia.org/wiki/Insensible_perspiration
Insensible perspiration is the loss of water through the skin which does not occur as perceivable sweat. Insensible perspiration takes place at an almost constant rate and reflects evaporative loss from the epithelial cells of
the skin. Unlike in sweating, the fluid lost is pure water, i.e. no
solutes are
lost. For this reason, it can also be referred to as "insensible water loss".

The amount of water lost in this way is deemed to be approximately 400ml
per day. Some sources broaden the definition of insensible perspiration to include not only the water lost through the skin, but also the water lost through the epithelium of the respiratory tract, which is also approximately 400ml per day.

Insensible perspiration is the main source of heat loss from the body, with
the figure being placed around 480 kCal per day, which is approximately 25%
of basal heat production.Insensible perspiration is not under regulatory control.


https://www.energy.gov/energysaver/evaporative-coolers
"In low-humidity areas, evaporating water into the air provides a natural
and energy-efficient means of cooling. Evaporative coolers, also called
swamp coolers, rely on this principle, cooling outdoor air by passing it
over water-saturated pads, causing the water to evaporate into it. The
15°- to 40°F-cooler air is then directed into the home, and pushes warmer
air out through windows."



https://www.ccohs.ca/oshanswers/phys_agents/humidex.html
Canadian Centre for Occupational Health and Safety

"What is the importance of humidity?
The body attempts to maintain a constant internal temperature of 37°C at
all times. In hot weather, the body produces sweat, which cools the body
as it evaporates. As the humidity or the moisture content in the air
increases, sweat does not evaporate as readily. Sweat evaporation stops entirely when the relative humidity reaches about 90 percent. Under these circumstances, the body temperature rises and may cause illness."



https://engineering.mit.edu/engage/ask-an-engineer/why-do-we-sweat-more-in-high-humidity/
"As the water evaporates, it transfers the body’s heat to the air. Because water has a high latent heat, which is the heat required to change liquid
water to vapor, this process usually carries away enough heat to do a good
job of cooling the body.”It’s a fabulous system,” says Christie.

"But the rate at which water — or in this case, sweat — evaporates depends on how much water is already in the air. On dry days, sweat evaporates
quickly, which means it also carries away heat faster. On humid days, when
the air is already saturated with water, sweat evaporates more slowly.

"This explains why it feels so much hotter in high humidity. When relative humidity reaches a high enough level, the body’s natural cooling system simply can’t work. Sweat evaporates very slowly, if at all, and the body heats up. In extreme cases, people begin to suffer from heat cramps or
heat stroke, which is basically organ failure as the body begins to cook itself.

"A metric called the heat index provides warnings for weather conditions
that will make heat stroke more likely. For instance, the body experiences 88-degree (Fahrenheit) weather with 85 percent humidity as if it were 110 degrees. Working outside, even in the shade, is dangerous in these
conditions. At 40 percent humidity or lower, however, 88 degrees feels
like 88 degrees, and gardening is once again a perfectly safe activity.

"To help athletes and laborers stay cool in extremely hot and humid
conditions, engineers have developed special clothing that wicks moisture
away from the skin. Wearing these fabrics “is like standing in a wind tunnel,” says Christie. The clothing pulls sweat off the skin through tiny channels in the fabric and deposits it on the outside of the fabric where
it evaporates. Fabrics that do not wick moisture away from the skin, such
as cotton, simply soak up the moisture and retain it — leaving you feeling soggy and hot."



https://phys.org/news/2021-04-chillest-ape-humans-evolved-super-high.html

"Scientists broadly assume that humans' high density of sweat glands,
also called eccrine glands, reflects an ancient evolutionary
adaptation. This adaptation, coupled with the loss of fur in early
hominins, which promoted cooling through sweat evaporation, is thought
to have made it easier for them to run, hunt, and otherwise survive on
the hot and relatively treeless African savannah, a markedly different
habitat than the jungles occupied by other ape species."

Repeated mutation of a developmental enhancer contributed to human thermoregulatory evolution.

https://www.pnas.org/content/118/16/e2021722118

Significance

One of the most distinctive physiological traits differentiating
humans from other primates is a reliance on sweating to cool off. The effectiveness of human thermoregulatory sweating is underlain by the
evolution of a dramatically increased density of water-secreting
eccrine sweat glands in human skin relative to that of other primates.
Here, we show that the accumulation of human-specific mutations in a developmental enhancer collectively promoted the production of eccrine
glands in humans by up-regulating the expression of the Engrailed 1 transcription factor in the skin. This study reveals a mechanism that contributed to the evolution of humans’ signature thermoregulatory capabilities and underscores the importance of regulatory evolution in generating the modern human form.

Abstract

Humans sweat to cool their bodies and have by far the highest eccrine
sweat gland density among primates. Humans’ high eccrine gland density
has long been recognized as a hallmark human evolutionary adaptation,
but its genetic basis has been unknown. In humans, expression of the
Engrailed 1 (EN1) transcription factor correlates with the onset of
eccrine gland formation. In mice, regulation of ectodermal En1
expression is a major determinant of natural variation in eccrine
gland density between strains, and increased En1 expression promotes
the specification of more eccrine glands. Here, we show that
regulation of EN1 has evolved specifically on the human lineage to
promote eccrine gland formation. Using comparative genomics and
validation of ectodermal enhancer activity in mice, we identified a
human EN1 skin enhancer, hECE18. We showed that multiple epistatically interacting derived substitutions in the human ECE18 enhancer
increased its activity compared with nonhuman ape orthologs in
cultured keratinocytes. Repression of hECE18 in human cultured
keratinocytes specifically attenuated EN1 expression, indicating this
element positively regulates EN1 in this context. In a humanized
enhancer knock-in mouse, hECE18 increased developmental En1 expression
in the skin to induce the formation of more eccrine glands. Our study
uncovers a genetic basis contributing to the evolution of one of the
most singular human adaptations and implicates multiple interacting
mutations in a single enhancer as a mechanism for human evolutionary
change.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On Friday, August 26, 2022 at 12:41:12 AM UTC-4, Primum Sapienti wrote:

[email protected] wrote:

Human sweating is for dry, not humid, conditions.

https://en.m.wikipedia.org/wiki/Insensible_perspiration
Insensible perspiration is the loss of water through the skin which does not occur as perceivable sweat. Insensible perspiration takes place at an almost constant rate and reflects evaporative loss from the epithelial cells of
the skin. Unlike in sweating, the fluid lost is pure water, i.e. no
solutes are
lost. For this reason, it can also be referred to as "insensible water loss".

The amount of water lost in this way is deemed to be approximately 400ml
per day. Some sources broaden the definition of insensible perspiration to include not only the water lost through the skin, but also the water lost through the epithelium of the respiratory tract, which is also approximately 400ml per day.

Insensible perspiration is the main source of heat loss from the body, with the figure being placed around 480 kCal per day, which is approximately 25% of basal heat production.Insensible perspiration is not under regulatory control.

https://www.energy.gov/energysaver/evaporative-coolers
"In low-humidity areas, evaporating water into the air provides a natural and energy-efficient means of cooling. Evaporative coolers, also called swamp coolers, rely on this principle, cooling outdoor air by passing it over water-saturated pads, causing the water to evaporate into it. The
15°- to 40°F-cooler air is then directed into the home, and pushes warmer air out through windows."

https://www.ccohs.ca/oshanswers/phys_agents/humidex.html
Canadian Centre for Occupational Health and Safety

"What is the importance of humidity?
The body attempts to maintain a constant internal temperature of 37°C at all times. In hot weather, the body produces sweat, which cools the body
as it evaporates. As the humidity or the moisture content in the air increases, sweat does not evaporate as readily. Sweat evaporation stops entirely when the relative humidity reaches about 90 percent. Under these circumstances, the body temperature rises and may cause illness."

https://engineering.mit.edu/engage/ask-an-engineer/why-do-we-sweat-more-in-high-humidity/
"As the water evaporates, it transfers the body’s heat to the air. Because water has a high latent heat, which is the heat required to change liquid water to vapor, this process usually carries away enough heat to do a good job of cooling the body.”It’s a fabulous system,” says Christie.

"But the rate at which water — or in this case, sweat — evaporates depends
on how much water is already in the air. On dry days, sweat evaporates quickly, which means it also carries away heat faster. On humid days, when the air is already saturated with water, sweat evaporates more slowly.

"This explains why it feels so much hotter in high humidity. When relative humidity reaches a high enough level, the body’s natural cooling system simply can’t work. Sweat evaporates very slowly, if at all, and the body heats up. In extreme cases, people begin to suffer from heat cramps or
heat stroke, which is basically organ failure as the body begins to cook itself.

"A metric called the heat index provides warnings for weather conditions that will make heat stroke more likely. For instance, the body experiences 88-degree (Fahrenheit) weather with 85 percent humidity as if it were 110 degrees. Working outside, even in the shade, is dangerous in these conditions. At 40 percent humidity or lower, however, 88 degrees feels
like 88 degrees, and gardening is once again a perfectly safe activity.

"To help athletes and laborers stay cool in extremely hot and humid conditions, engineers have developed special clothing that wicks moisture away from the skin. Wearing these fabrics “is like standing in a wind tunnel,” says Christie. The clothing pulls sweat off the skin through tiny channels in the fabric and deposits it on the outside of the fabric where
it evaporates. Fabrics that do not wick moisture away from the skin, such
as cotton, simply soak up the moisture and retain it — leaving you feeling soggy and hot."

https://phys.org/news/2021-04-chillest-ape-humans-evolved-super-high.html

"Scientists broadly assume that humans' high density of sweat glands,
also called eccrine glands, reflects an ancient evolutionary
adaptation. This adaptation, coupled with the loss of fur in early
hominins, which promoted cooling through sweat evaporation, is thought
to have made it easier for them to run, hunt, and otherwise survive on
the hot and relatively treeless African savannah, a markedly different habitat than the jungles occupied by other ape species."

Repeated mutation of a developmental enhancer contributed to human thermoregulatory evolution.

https://www.pnas.org/content/118/16/e2021722118

Significance

One of the most distinctive physiological traits differentiating
humans from other primates is a reliance on sweating to cool off. The effectiveness of human thermoregulatory sweating is underlain by the evolution of a dramatically increased density of water-secreting
eccrine sweat glands in human skin relative to that of other primates.
Here, we show that the accumulation of human-specific mutations in a developmental enhancer collectively promoted the production of eccrine glands in humans by up-regulating the expression of the Engrailed 1 transcription factor in the skin. This study reveals a mechanism that contributed to the evolution of humans’ signature thermoregulatory capabilities and underscores the importance of regulatory evolution in generating the modern human form.

Abstract

Humans sweat to cool their bodies and have by far the highest eccrine
sweat gland density among primates. Humans’ high eccrine gland density
has long been recognized as a hallmark human evolutionary adaptation,
but its genetic basis has been unknown. In humans, expression of the Engrailed 1 (EN1) transcription factor correlates with the onset of
eccrine gland formation. In mice, regulation of ectodermal En1
expression is a major determinant of natural variation in eccrine
gland density between strains, and increased En1 expression promotes
the specification of more eccrine glands. Here, we show that
regulation of EN1 has evolved specifically on the human lineage to
promote eccrine gland formation. Using comparative genomics and
validation of ectodermal enhancer activity in mice, we identified a
human EN1 skin enhancer, hECE18. We showed that multiple epistatically interacting derived substitutions in the human ECE18 enhancer
increased its activity compared with nonhuman ape orthologs in
cultured keratinocytes. Repression of hECE18 in human cultured
keratinocytes specifically attenuated EN1 expression, indicating this element positively regulates EN1 in this context. In a humanized
enhancer knock-in mouse, hECE18 increased developmental En1 expression
in the skin to induce the formation of more eccrine glands. Our study uncovers a genetic basis contributing to the evolution of one of the
most singular human adaptations and implicates multiple interacting mutations in a single enhancer as a mechanism for human evolutionary
change.

Fur reduction due to nocturnal sheltering, eccrine increase due to nakedness (canopy + drinking water)

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Op vrijdag 26 augustus 2022 om 06:41:12 UTC+2 schreef Primum Sapienti:

Human sweating is for dry, not humid, conditions.

Yes, my boy, *thermoregulatory* sweating is for outside the water...
:-DDD

Of all mammals, humans produce most sweat AFAWK.
Montagna (1965):
Sweating is an enigma that amounts to a major biological blunder:
it depletes the body not only of water, but also of sodium & other essential electrolytes:
why did our supposed savanna ancestors lose their protective fur, but develop thermo-active sweat-glands?

Many small mammals (rodents, marsupials, cats...) do not sweat thermoactively, but salivate:
- they spread saliva over a less-haired part of the skin, the saliva evaporates, and cools the body,
- or they pant, just as most larger mammals like sheep or dogs.

The costs and benefits of salivation, panting & sweating for mammals of different size, habitats & lifestyles are not clear yet (Schmidt-Nielsen 1979:viii).
African hunting-dogs sweat nor pant nor salivate, but like all savanna mammals, they tolerate much higher body Tps (which saves a lot of water),
and they usu.rest in holes during the day.
Some larger mammals like camels, bovids, equids & OW-monkeys have somewhat larger water losses through their skin when they are overheated (through apocrine glands, not through eccrine glands as in humans),
but their maximal water losses per surface of skin are always much smaller than in humans (Schmidt-Nielsen 1979:54,73,83).

Fur-seals are the only the mammals that sweat thermo-actively through abundant eccrine glands (on their naked hind flippers) when they are overheated on land (McFarland cs 1979:773).

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On Friday, August 26, 2022 at 12:12:37 PM UTC-4, [email protected] wrote:

Op vrijdag 26 augustus 2022 om 06:41:12 UTC+2 schreef Primum Sapienti:

Human sweating is for dry, not humid, conditions.

Yes, my boy, *thermoregulatory* sweating is for outside the water...
:-DDD
Of all mammals, humans produce most sweat AFAWK.
Montagna (1965):
Sweating is an enigma that amounts to a major biological blunder:
it depletes the body not only of water, but also of sodium & other essential electrolytes:
why did our supposed savanna ancestors lose their protective fur, but develop thermo-active sweat-glands?

Many small mammals (rodents, marsupials, cats...) do not sweat thermoactively, but salivate:
- they spread saliva over a less-haired part of the skin, the saliva evaporates, and cools the body,
- or they pant, just as most larger mammals like sheep or dogs.

The costs and benefits of salivation, panting & sweating for mammals of different size, habitats & lifestyles are not clear yet (Schmidt-Nielsen 1979:viii).
African hunting-dogs sweat nor pant nor salivate, but like all savanna mammals, they tolerate much higher body Tps (which saves a lot of water),
and they usu.rest in holes during the day.
Some larger mammals like camels, bovids, equids & OW-monkeys have somewhat larger water losses through their skin when they are overheated (through apocrine glands, not through eccrine glands as in humans),
but their maximal water losses per surface of skin are always much smaller than in humans (Schmidt-Nielsen 1979:54,73,83).

Fur-seals are the only the mammals that sweat thermo-actively through abundant eccrine glands (on their naked hind flippers) when they are overheated on land (McFarland cs 1979:773).

Fur seal flippers = dog paws, both produce typical mammal warm-blooded volar eccrine sweat when active or externally heated.

Humans have reduced fur (except scalp hair & beard = baby grip) due to constructed transportable shelter & derived clothing which selected for increased all-over eccrines.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On Friday, August 26, 2022 at 12:59:53 PM UTC-4, DD'eDeN aka note/nickname/alas_my_loves wrote:

On Friday, August 26, 2022 at 12:12:37 PM UTC-4, [email protected] wrote:

Op vrijdag 26 augustus 2022 om 06:41:12 UTC+2 schreef Primum Sapienti:

Human sweating is for dry, not humid, conditions.

Yes, my boy, *thermoregulatory* sweating is for outside the water...
:-DDD
Of all mammals, humans produce most sweat AFAWK.
Montagna (1965):
Sweating is an enigma that amounts to a major biological blunder:
it depletes the body not only of water, but also of sodium & other essential electrolytes:
why did our supposed savanna ancestors lose their protective fur, but develop thermo-active sweat-glands?

Many small mammals (rodents, marsupials, cats...) do not sweat thermoactively, but salivate:
- they spread saliva over a less-haired part of the skin, the saliva evaporates, and cools the body,
- or they pant, just as most larger mammals like sheep or dogs.

The costs and benefits of salivation, panting & sweating for mammals of different size, habitats & lifestyles are not clear yet (Schmidt-Nielsen 1979:viii).
African hunting-dogs sweat nor pant nor salivate, but like all savanna mammals, they tolerate much higher body Tps (which saves a lot of water),
and they usu.rest in holes during the day.
Some larger mammals like camels, bovids, equids & OW-monkeys have somewhat larger water losses through their skin when they are overheated (through apocrine glands, not through eccrine glands as in humans),
but their maximal water losses per surface of skin are always much smaller than in humans (Schmidt-Nielsen 1979:54,73,83).

Fur-seals are the only the mammals that sweat thermo-actively through abundant eccrine glands (on their naked hind flippers) when they are overheated on land (McFarland cs 1979:773).

Fur seal flippers = dog paws, both produce typical mammal warm-blooded volar eccrine sweat when active or externally heated.

Humans have reduced fur (except scalp hair & beard = baby grip) due to constructed transportable shelter & derived clothing which selected for increased all-over eccrines.

Humans developed active eccrine sweating due to high heat without direct sunlight (unlike savanna fauna, which could never afford water loss) due to dwelling under sheltering closed canopy (domeshields) during mid-day sun. Light body-sweating produced a
slight body cooling without wasting water. Heavy sweating while stressed is pathological due to waste of water & salts, but can be beneficial in short-term, evolutionarily derived from habitual long group walks (foraging, tracking) while shaded between
mobile camps within 100m of shallow crystalline streams.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Primum Sapienti wrote:

Human sweating is for dry, not humid, conditions.

: Why Do We Sweat More in Humid Weather?

https://thompsontee.com/blog/sweating-in-humidity-how-to-get-through-the-hottest-time-of-the-year/

Humans are a tropical species. We may have adapted to desert
conditions -- or some populations at least -- but we evolved in
tropical and sub tropical environments.



-- --

https://jtem.tumblr.com/post/695938043272724480

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

[email protected] wrote:

Op vrijdag 26 augustus 2022 om 06:41:12 UTC+2 schreef Primum Sapienti:

Human sweating is for dry, not humid, conditions.

And not for being aquatic.

Yes

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On Friday, September 23, 2022 at 12:55:55 AM UTC-4, JTEM is so reasonable wrote:

Primum Sapienti wrote:

Human sweating is for dry, not humid, conditions.

: Why Do We Sweat More in Humid Weather?

https://thompsontee.com/blog/sweating-in-humidity-how-to-get-through-the-hottest-time-of-the-year/

Humans are a tropical species. We may have adapted to desert
conditions -- or some populations at least -- but we evolved in
tropical and sub tropical environments.

-- --

https://jtem.tumblr.com/post/695938043272724480

To stop sweating in humidity, spend more time indoors.
Under domeshields.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Somebody:

To stop sweating in humidity, spend more time indoors.
Under domeshields.

Of all mammals, humans produce most sweat.
Montagna (1965):
Sweating is an enigma that amounts to a major biological blunder:
it depletes the body not only of water, but also of sodium & other essential electrolytes:
why did our supposed savanna ancestors lose their protective fur, but develop thermo-active sweat-glands?

Many small mammals (rodents, marsupials, cats...) do not sweat thermoactively, but salivate:
- they spread saliva over a less-haired part of the skin, the saliva evaporates & cools the body,
- or they pant, just as most larger mammals like sheep or dogs.

The costs & benefits of salivation, panting & sweating for mammals of different size, habitats & lifestyles are not clear yet (Schmidt-Nielsen 1979:viii).
African hunting-dogs sweat nor pant nor salivate, but like all savanna mammals, they tolerate much higher body Tps (which saves a lot of water),
and they usu.rest in holes during the day.
Some larger mammals like camels, bovids, equids & OWMs have somewhat larger water losses through their skin when they are overheated through apocrine glands (not through eccrine glands as in humans),
but their maximal water losses per surface of skin are always much smaller than in humans (Schmidt-Nielsen 1979:54,73,83).

Fur-seals are the only the mammals that sweat thermo-actively through abundant eccrine glands (on their naked hind flippers) when they are overheated on land (McFarland cs 1979:773).

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On Friday, September 23, 2022 at 1:54:58 AM UTC-4, [email protected] wrote:

Somebody:

To stop sweating in humidity, spend more time indoors.
Under domeshields.

Of all mammals, humans produce most sweat.

Living near freshwater but not in swamps.

Montagna (1965):
Sweating is an enigma that amounts to a major biological blunder:
it depletes the body not only of water, but also of sodium & other essential electrolytes:
why did our supposed savanna ancestors lose their protective fur, but develop thermo-active sweat-glands?

Constructed shade shelters, tilted for breeze. Made from forest products, wood & leaves, then wood & grass.
Heavy sweating was abnormal & costly, light sweating normal and efficient.

Many small mammals (rodents, marsupials, cats...) do not sweat thermoactively, but salivate:
- they spread saliva over a less-haired part of the skin, the saliva evaporates & cools the body,
- or they pant, just as most larger mammals like sheep or dogs.
The costs & benefits of salivation, panting & sweating for mammals of different size, habitats & lifestyles are not clear yet (Schmidt-Nielsen 1979:viii).
African hunting-dogs sweat nor pant nor salivate, but like all savanna mammals, they tolerate much higher body Tps (which saves a lot of water),
and they usu.rest in holes during the day.

Of course, savanna fauna in prefer to rest under shade in the heat of the day, most active at dawn and dusk. Forest fauna are more active in daylight because of the canopy.

Some larger mammals like camels, bovids, equids & OWMs have somewhat larger water losses through their skin when they are overheated through apocrine glands (not through eccrine glands as in humans),
but their maximal water losses per surface of skin are always much smaller than in humans (Schmidt-Nielsen 1979:54,73,83).

Fur-seals are the only the mammals that sweat thermo-actively through abundant eccrine glands (on their naked hind flippers) when they are overheated on land (McFarland cs 1979:773).

Like their canine kin, sweating through their paws.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On Friday, September 23, 2022 at 8:23:34 AM UTC-4, DD'eDeN aka note/nickname/alas_my_loves wrote:

On Friday, September 23, 2022 at 1:54:58 AM UTC-4, [email protected] wrote:

Somebody:

To stop sweating in humidity, spend more time indoors.
Under domeshields.

Of all mammals, humans produce most sweat.

Living near freshwater but not in swamps.

Montagna (1965):
Sweating is an enigma that amounts to a major biological blunder:
it depletes the body not only of water, but also of sodium & other essential electrolytes:
why did our supposed savanna ancestors lose their protective fur, but develop thermo-active sweat-glands?

Constructed shade shelters, tilted for breeze. Made from forest products, wood & leaves, then wood & grass.
Heavy sweating was abnormal & costly, light sweating normal and efficient.

Many small mammals (rodents, marsupials, cats...) do not sweat thermoactively, but salivate:
- they spread saliva over a less-haired part of the skin, the saliva evaporates & cools the body,
- or they pant, just as most larger mammals like sheep or dogs.
The costs & benefits of salivation, panting & sweating for mammals of different size, habitats & lifestyles are not clear yet (Schmidt-Nielsen 1979:viii).
African hunting-dogs sweat nor pant nor salivate, but like all savanna mammals, they tolerate much higher body Tps (which saves a lot of water),
and they usu.rest in holes during the day.

Of course, savanna fauna in prefer to rest under shade in the heat of the day, most active at dawn and dusk. Forest fauna are more active in daylight because of the canopy.

Some larger mammals like camels, bovids, equids & OWMs have somewhat larger water losses through their skin when they are overheated through apocrine glands (not through eccrine glands as in humans),
but their maximal water losses per surface of skin are always much smaller than in humans (Schmidt-Nielsen 1979:54,73,83).

Fur-seals are the only the mammals that sweat thermo-actively through abundant eccrine glands (on their naked hind flippers) when they are overheated on land (McFarland cs 1979:773).

Like their canine kin, sweating through their paws.

Platypus sweat from Quora

They secrete milk from specialised mammary glands, just like humans and other mammals. But platypuses don’t have teats, so the milk just oozes from the surface of their skin. This makes it look like sweat, but in fact platypuses are aquatic and don’t
produce regular sweat at all.

The male platypus has a spur. This is connected to a modified sweat gland which creates a powerful venom.

Platypus venom is one of the most painful poisons in the world, described as “immediate, sustained, and devastating.” And here “sustained” means the effects have been reported to linger for three months. The good news is there haven’t been any
reported human fatalities and there is research reported in Nature journal Scientific Reports which reveal that the same hormone produced in the gut of the platypus to regulate blood glucose is also surprisingly produced in their venom. Professor Patrick
Sexton and Dr. Denise Wooten reported the findings mean that platypus venom could hold the key to diabetes treatment.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Op vrijdag 23 september 2022 om 14:23:34 UTC+2 schreef DD'eDeN aka note/nickname/alas_my_loves:

To stop sweating in humidity, spend more time indoors.
Under domeshields.

Of all mammals, humans produce most sweat.

Living near freshwater but not in swamps.

Sigh.
My little boy, sweat = salt.
We developed eccrine sweating at the coasts, just like fur-seals.

Montagna (1965):
Sweating is an enigma that amounts to a major biological blunder:
it depletes the body not only of water, but also of sodium & other essential electrolytes:
why did our supposed savanna ancestors lose their protective fur, but develop thermo-active sweat-glands?

Constructed shade shelters, tilted for breeze.

???
Keep running after your kudu, my little boy: can one really be so stupid??

Sweat = water + salt = thermoregulation at sea-coasts.

Many small mammals (rodents, marsupials, cats...) do not sweat thermoactively, but salivate:
- they spread saliva over a less-haired part of the skin, the saliva evaporates & cools the body,
- or they pant, just as most larger mammals like sheep or dogs.
The costs & benefits of salivation, panting & sweating for mammals of different size, habitats & lifestyles are not clear yet (Schmidt-Nielsen 1979:viii).
African hunting-dogs sweat nor pant nor salivate, but like all savanna mammals, they tolerate much higher body Tps (which saves a lot of water),
and they usu.rest in holes during the day.
Some larger mammals like camels, bovids, equids & OWMs have somewhat larger water losses through their skin when they are overheated through apocrine glands (not through eccrine glands as in humans),
but their maximal water losses per surface of skin are always much smaller than in humans (Schmidt-Nielsen 1979:54,73,83).
Fur-seals are the only the mammals that sweat thermo-actively through abundant eccrine glands (on their naked hind flippers) when they are overheated on land (McFarland cs 1979:773).

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On Friday, September 23, 2022 at 1:08:33 PM UTC-4, [email protected] wrote:

Op vrijdag 23 september 2022 om 14:23:34 UTC+2 schreef DD'eDeN aka note/nickname/alas_my_loves:

To stop sweating in humidity, spend more time indoors.
Under domeshields.

Of all mammals, humans produce most sweat.

Living near freshwater but not in swamps.

Sigh.
My little boy, sweat = salt.
We developed eccrine sweating at the coasts, just like fur-seals.

Same as wolves eccrine sweat their paws on open plains. A mammoth contained 6 years of salt per hunter. Humans and wolves ate mammoth.

Montagna (1965):
Sweating is an enigma that amounts to a major biological blunder:
it depletes the body not only of water, but also of sodium & other essential electrolytes:
why did our supposed savanna ancestors lose their protective fur, but develop thermo-active sweat-glands?

Constructed shade shelters, tilted for breeze.

???
Keep running after your kudu, my little boy: can one really be so stupid??

Says kudu boy in his shelter. Theorist? Theologian!
Keep swimming after your mermaid.

Sweat = water + salt = thermoregulation at sea-coasts.

Sea otters??

Many small mammals (rodents, marsupials, cats...) do not sweat thermoactively, but salivate:
- they spread saliva over a less-haired part of the skin, the saliva evaporates & cools the body,
- or they pant, just as most larger mammals like sheep or dogs.
The costs & benefits of salivation, panting & sweating for mammals of different size, habitats & lifestyles are not clear yet (Schmidt-Nielsen 1979:viii).
African hunting-dogs sweat nor pant nor salivate, but like all savanna mammals, they tolerate much higher body Tps (which saves a lot of water),
and they usu.rest in holes during the day.
Some larger mammals like camels, bovids, equids & OWMs have somewhat larger water losses through their skin when they are overheated through apocrine glands (not through eccrine glands as in humans),
but their maximal water losses per surface of skin are always much smaller than in humans (Schmidt-Nielsen 1979:54,73,83).
Fur-seals are the only the mammals that sweat thermo-actively through abundant eccrine glands (on their naked hind flippers) when they are overheated on land (McFarland cs 1979:773).

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Op vrijdag 23 september 2022 om 21:40:40 UTC+2 schreef DD'eDeN aka note/nickname/alas_my_loves:

is as usual too stupid to answer decently:

To stop sweating in humidity, spend more time indoors.
Under domeshields.

Of all mammals, humans produce most sweat.

Living near freshwater but not in swamps.

Sigh.
My little boy, sweat = salt.
We developed eccrine sweating at the coasts, just like fur-seals.

Same as wolves eccrine sweat their paws on open plains. A mammoth contained 6 years of salt per hunter. Humans and wolves ate mammoth.

Montagna (1965):
Sweating is an enigma that amounts to a major biological blunder:
it depletes the body not only of water, but also of sodium & other essential electrolytes:
why did our supposed savanna ancestors lose their protective fur, but develop thermo-active sweat-glands?

Constructed shade shelters, tilted for breeze.

???
Keep running after your kudu, my little boy: can one really be so stupid??

Says kudu boy in his shelter. Theorist? Theologian!
Keep swimming after your mermaid.

Sweat = water + salt = thermoregulation at sea-coasts.

Sea otters??

Many small mammals (rodents, marsupials, cats...) do not sweat thermoactively, but salivate:
- they spread saliva over a less-haired part of the skin, the saliva evaporates & cools the body,
- or they pant, just as most larger mammals like sheep or dogs.
The costs & benefits of salivation, panting & sweating for mammals of different size, habitats & lifestyles are not clear yet (Schmidt-Nielsen 1979:viii).
African hunting-dogs sweat nor pant nor salivate, but like all savanna mammals, they tolerate much higher body Tps (which saves a lot of water),
and they usu.rest in holes during the day.
Some larger mammals like camels, bovids, equids & OWMs have somewhat larger water losses through their skin when they are overheated through apocrine glands (not through eccrine glands as in humans),
but their maximal water losses per surface of skin are always much smaller than in humans (Schmidt-Nielsen 1979:54,73,83).
Fur-seals are the only the mammals that sweat thermo-actively through abundant eccrine glands (on their naked hind flippers) when they are overheated on land (McFarland cs 1979:773).

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)