Where does this come from, and can I check it?

Eccrine and apocrine glands secrete watery sweat to cool body surface. The figure is taken from NIH, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

Is this really a human body fact?

Yes. It sits on the Human Body shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

What else can I read about it?

The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.

Mondo Knows Facts

The human body contains up to four million sweat glands

Eccrine and apocrine glands secrete watery sweat to cool body surface

Humans possess between two and four million sweat glands distributed across the skin. Eccrine glands release watery fluid directly onto skin to cool the body via evaporative cooling, while apocrine glands in dense hair areas secrete thicker fluids linked to body odour.

Where this comes from

NIH

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Human thermoregulation maintains a core temperature near thirty-seven degreesSweating vascular dilation and shivering maintain narrow thermal boundaries Shivering generates internal heat through rapid muscle twitchesInvoluntary muscle contractions burn energy to maintain stable body temperature Yawning helps cool the brain and increase mental alertnessInhaling deep cool air regulates brain temperature during fatigue transition Specialised thermoreceptors detect temperature changes in skinDistinct nerve endings register cold and warm thermal stimuli independently Microscopic dust mites feed on shed human skin flakesDander lost daily from skin provides nourishment for indoor microscopic arachnids Goosebumps are caused by tiny hair follicle muscles contractingArrector pili muscles pull skin hairs upright in response to cold or emotion

Tags: sweat, skin, thermoregulation

The human body contains up to four million sweat glands: the short answers

Where does this come from, and can I check it?: Eccrine and apocrine glands secrete watery sweat to cool body surface. The figure is taken from NIH, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a human body fact?: Yes. It sits on the Human Body shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.