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sweat gland

sweat gland
A small gland in the skin of a mammal that secretes a salty fluid solution (sweat). Excess body heat causes the sweat to evaporate, which brings about cooling. Sweat glands are formed from the epidermis but project deep into the dermis. They occur over most of the body surface in humans and other higher primates but have a more limited distribution in other mammals. Dogs, for example, have very few sweat glands, and those mostly on the pads of the feet.

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