SEBACEOUS GLANDS Biology Diagrams Sebaceous Glands - They produce sebum, an oily substance that lubricates and waterproofs the skin and hair. Eccrine Sweat Glands - They regulate body temperature by releasing sweat across most of the body. Apocrine Sweat Glands - Located in the dermis of the armpits and groin, they produce a thicker sweat involved in scent signaling. A sebaceous gland or oil gland [1] is a microscopic exocrine gland in the skin that opens into a hair follicle to secrete an oily or waxy matter, called sebum, which lubricates the hair and skin of mammals. [2] In humans, sebaceous glands occur in the greatest number on the face and scalp, but also on all parts of the skin except the palms of the hands and soles of the feet.
Sebaceous glands vary considerably in size, even in the same individual and in the same anatomic area. The sebaceous glands exude lipids by disintegration of entire cells, a process known as holocrine secretion. Human sebum, as it leaves the sebaceous gland, contains squalene, cholesterol, cholesterol esters, wax esters, and triglycerides.
Chapter 79. Biology of Sebaceous Glands Biology Diagrams
The sebaceous gland is integral to the structure and function of the skin, providing 90% of its surface lipids. While much of the focus relating to the sebaceous gland comes from its central role in acne vulgaris, several new functions have come to light that highlight this versatile cellular unit's complex role in skin homeostasis. The sebaceous gland is special in at least 2 ways. Firstly
Structure and Anatomy. The sebaceous gland is a crucial component of the skin's structure, responsible for producing and secreting sebum. Below is a detailed breakdown of the anatomy of the sebaceous gland: Netter's Atlas of Human Anatomy (7th ed.). Elsevier. ISBN: 978-0323393225. McGrath, J. A., Eady, R. A. J., & Pope, F. M. (2008). However, after birth, sebaceous glands shrink until there is nearly no activity. This changes after the age of six, and reaches the pinnacle of activity at puberty. Gland activity is very much linked to the levels of male hormone, testosterone. Function of Sebaceous Glands. The main function of the fatty sebaceous gland is to lubricate the skin.
Sebaceous gland Biology Diagrams
sebaceous gland, small oil-producing gland present in the skin of mammals. Sebaceous glands are usually attached to hair follicles and release a fatty substance, sebum, into the follicular duct and thence to the surface of the skin.The glands are distributed over the entire body with the exception of the palms of the hands and the soles of the feet; they are most abundant on the scalp and face.
