What is the Difference Between Merocrine and Apocrine Sweat Glands?

The main differences between merocrine and apocrine sweat glands are their location, structure, activity, and method of secretion. Here is a comparison of the two types of sweat glands:

• Location: Apocrine sweat glands are associated with hair follicles and are found in certain parts of the body, such as the armpits, genital area, and areola of the nipples. Merocrine sweat glands, also known as eccrine glands, are found throughout the skin and are more concentrated on the palms of the hands and soles of the feet.
• Structure: Apocrine glands are about 10 times larger than merocrine glands. Merocrine glands are comprised of a straight section and a secretory coiled part.
• Activity: Apocrine sweat glands become active at puberty, while merocrine sweat glands are active from birth.
• Method of Secretion: Apocrine sweat gland secretion involves the part of the cell containing the secretion pinching off. Merocrine sweat gland secretion involves exocytosis of vesicles containing the sweat.

Apocrine sweat glands secrete a milky fluid that plays a role in emotional responses, such as fear and pain. Merocrine sweat glands secrete a watery fluid that helps with thermoregulation, waste elimination, and maintenance of skin hydration.

Comparative Table: Merocrine vs Apocrine Sweat Glands

Merocrine and apocrine sweat glands are two types of sweat glands that play important roles in human thermoregulation and odor production. Here is a table highlighting their differences:

Merocrine sweat glands, also known as eccrine glands, secrete sweat directly onto the surface of the skin and are involved in thermal regulation and skin protection. Apocrine sweat glands, on the other hand, secrete sweat into the sacs of hair follicles and are located deep within the skin. Apocrine glands are inactive until puberty and produce thick, odorless substances that provide nutrients for bacteria on the skin, contributing to body odor.