Sweat gland
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Sweat glands, also known as sudoriferous or sudoriparous glands, Template:Etymology, are small tubular structures of the skin that produce sweat. Sweat glands are a type of exocrine gland, which are glands that produce and secrete substances onto an epithelial surface by way of a duct. There are two main types of sweat glands that differ in their structure, function, secretory product, mechanism of excretion, anatomic distribution, and distribution across species:
- Eccrine sweat glands are distributed almost all over the human body, in varying densities, with the highest density in palms and soles, then on the head, but much less on the trunk and the extremities. Its water-based secretion represents a primary form of cooling in humans.Template:Sfn
- Apocrine sweat glands are mostly limited to the axilla (armpits) and perianal areas in humans.Template:Sfn They are not significant for cooling in humans, but are the sole effective sweat glands in hoofed animals, such as the camels, donkeys, horses, and cattle.Template:Sfn
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