Sweat glands & Sebaceous Glands

The two most common exocrine glands are sweat glands and sebaceous glands.

There are two different types of sweat glands in the skin this includes: merocrine sweat glands and apocrine sweat glands.

Merocrine sweat glands: The majority of the body is covered in merocrine (eccrine) sweat glands, which open directly onto the skin's surface. These are simple, coil-shaped tubular glands that expel secretions onto the skin's surface. Sweat is the transparent fluid released by exocytosis. The main purpose of the merocrine sweat glands is thermoregulation, which is the control of body temperature by the evaporation fluid through the skin.

Apocrine sweat glands:These are coiled, tubular glands that release secretion through the hair follicle and exit at the skin's surface. In regions with a large number of hair follicles, such as the scalp, armpits, and groin, apocrine glands form. Around puberty, these sweat glands start to function and release fluids.

Sebaceous Glands: They are holocrine glands that produce an oily, waxy substances known as sebum, which is typically released into a hair follicle and onto the hair itself. Sebum, which includes triglycerides and products of fatty acid breakdown, wax esters, squalene, cholesterol esters, and cholesterol, serves as a lubricant and is produced and secreted by sebaceous glands as part of their normal function. Sebum keeps hair and the skin from becoming dry and prevents it from being brittle and cracking. The sebaceous gland acts as a natural light protector and distributes antioxidants into and onto the skin. It actively participates in the healing of wounds and has the ability to control the activity of xenobiotics.