Which exocrine gland produces sweat on the epidermal surface?

Question

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The epidermis is the top layer of your skin. Eccrine glands (also called merocrine glands) produce a thin, watery secretion (sweat) directly onto the surface of the epidermis that cools the body when it evaporates.
Apocrine glands open into the hair follicle, leading to the surface of the skin. Apocrine glands develop in areas abundant in hair follicles, such as on your scalp, armpits, and groin. The sweat produced from apocrine glands contain bits of cell cytoplasm that is consumed by bacteria, which produces body odor.
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 Exocrine Gland Produces Sweat on the Epidermal Surface