Yes, the skin is an excretory organ.
The skin plays a crucial role in excretion, primarily through sweat glands. Here's a breakdown:
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Excretory Function: The skin helps eliminate waste products from the body.
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Sweat Glands: The skin contains millions of sweat glands (estimated 3 to 4 million eccrine sweat glands), which are responsible for producing sweat. These glands are distributed over almost the entire human body surface.
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Eccrine Sweat Glands: The eccrine glands help with thermoregulation and excrete water, salts (like sodium chloride), and small amounts of urea. According to the reference, the eccrine sweat glands together roughly weigh the same as one kidney (i.e., 100 g).
Therefore, the skin functions as an excretory organ by eliminating waste substances through sweat.
