sebaceous follicle
Học thuậtThân thiện
Definition
Noun: A sebaceous follicle is a microscopic sac or gland in the skin, typically connected to a hair follicle, that produces and secretes an oily, waxy substance called sebum. This secretion helps to lubricate and waterproof the skin and hair.
Usage
The term is used in medical, dermatological, and biological contexts to describe a specific anatomical structure. * The sebaceous follicle is the site where acne commonly forms due to excess sebum production. * Each hair on your body is associated with a sebaceous follicle. * A blocked sebaceous follicle can lead to a pimple.
Advanced Usage
- The size and activity of sebaceous follicles vary in different areas of the body, being largest and most numerous on the face and scalp.
- In medical literature, the term is often used when discussing the pathogenesis of skin disorders like acne vulgaris, where the follicle becomes clogged and inflamed.
Variants and Related Words
- Sebaceous gland: This is a direct synonym. "Sebaceous follicle" often specifically implies the gland's association with a hair follicle, while "sebaceous gland" is a more general term that also includes glands not connected to hair (e.g., on the lips).
- Follicle: A general term for a small cavity or sac. A sebaceous follicle is one type of follicle.
- Sebum: The oily substance secreted by the sebaceous follicle.
Synonyms
- Sebaceous gland
- Oil gland (a common, non-technical term)
Related Phrases/Compounds
- Sebaceous cyst: A non-cancerous, closed sac beneath the skin that can form from a blocked sebaceous follicle.
- Pilosebaceous unit: The structure consisting of the hair follicle, the hair shaft, and the associated sebaceous follicle.
Noun
- a cutaneous gland that secretes sebum (usually into a hair follicle) for lubricating hair and skin