Which structure in the epidermis is responsible for cooling the body to maintain temperature homeostasis?

Question

Quizplus · Accepted Answer

A derivative of the epidermis (or epidermal derivative) refers to anything that comes out of the epidermis, which is the top and most protective layer of the skin. Epidermal derivatives include sweat glands, sebaceous glands, mammary glands, hair, and nails. 
The epidermal derivative that helps regulate your body temperature are the eccrine glands (also called merocrine glands), which are the glands of the skin that produce a thin, watery secretion (sweat) that cools the body when it evaporates (turns from liquid into a gas).
The sebaceous glands secrete an oil (called sebum) onto the skin and hair for lubrication and to prevent drying.
Ceruminous glands are a type of apocrine gland. They secrete earwax into the ear canal to protect the ear from bacteria and viruses.
Note the eccrine sweat glands coming out of the epidermis in the diagram below.
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Which Structure in the Epidermis Is Responsible for Cooling the Body