The part of mammalian skin that excretes metabolic wastes is?

A. sweat gland
B. horny layer
C. Malpighian layer
D. sebaceous gland

Correct Answer:

Option A – sweat gland

Explanation

Sweat glands are used to regulate temperature and remove waste by secreting water, sodium salts, and nitrogenous waste (such as urea) onto the skin surface.