Sebum Definition Anatomy

Sebaceous glands are microscopic exocrine glands in the skin that secrete an oily or waxy matter called sebum to lubricate and waterproof the skin and hair of mammals. Sebum is a light yellow oily substance that is secreted by the sebaceous glands that help keep the skin and hair moisturized.

Hair Follicle Anatomy Medlineplus Medical Encyclopedia Image

Any of the small sacculated glands lodged in the substance of the derma usually opening into the hair follicles and secreting an oily or greasy material composed in great part of fat which softens and lubricates the hair and skin.

Sebum definition anatomy. Sebum synonyms sebum pronunciation sebum translation english dictionary definition of sebum. Sebum the oily secretion of the sebaceous glands whose ducts open into the hair follicles. Sebum is made up of triglycerides free fatty acids wax esters squalene cholesterol esters and cholesterol.

The semifluid secretion of the sebaceous glands consisting chiefly of fat keratin and cellular material. 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. Medical definition of sebaceous gland.

Sebaceous gland plural sebaceous glands anatomy a gland of the skin which secretes an oily substance sebum usually into a hair follicle near the surface of the skin. It is composed of fat and epithelial debris from the cells of the malpighian layer and it lubricates the skin. The type of secretion of the sebaceous glands is referred to as holocrine.

Since sebaceous glands secrete their oil into ducts before reaching the surface of the skin they are considered exocrine glands. This oil lubricates the skin and scalp of mammals. The waxy oil that is secreted into the hair follicles is called the sebum.

They are holocrine glands ie the sebum consists of the entire secreting cells. An oily secretion of the sebaceous gland which helps to preserve the flexibility of the hair. Sebaceous gland small oil producing gland present in the skin of mammals.

In the eyelids meibomian glands also called tarsal glands are a type of sebaceous gland that secr. In humans they 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 are numerous microscopic glands in the dermis that usually open into the hair follicles and secrete sebum.

N the oily secretion of the sebaceous glands.

Sebaceous Gland