Skin Anatomy and Functions

Front

What is the epidermis?

Back

The epidermis is the thin, outer layer of the skin that is visible to the eye and works to provide protection to the body. It does not contain any blood vessels and relies on the dermis for nutrients and waste disposal.

Front

What is the dermis?

Back

The dermis is the layer of skin beneath the epidermis and above the subcutaneous layer. It is the thickest layer, made of fibrous and elastic tissue, providing strength and flexibility to the skin.

Front

What is a hair follicle?

Back

A hair follicle is the pocket from which a hair grows.

Front

What is the hair shaft?

Back

The hair shaft is the part of the hair visible above the scalp, made of keratin, a protein compacted and fused together. Keratin is also found in nails, hoofs, feathers, and claws.

Front

What is a sweat gland?

Back

Sweat glands, also known as sudoriferous glands, are small tubular structures in the skin that produce sweat.

Front

What is the arrector pili muscle?

Back

The arrector pili muscle is a tiny muscle that attaches to the base of a hair follicle and dermal tissue. It contracts to generate heat, causing hair to stand up straight when the body is cold.

Front

What is a sebaceous gland?

Back

A sebaceous gland is a microscopic exocrine gland in the skin that opens into a hair follicle to secrete sebum, an oily or waxy matter that lubricates hair and skin.

Front

What role do nerves and blood vessels play in hair growth?

Back

Nerves and blood vessels supply oxygen and nutrients essential for successful hair follicle growth, maturation, and maintenance.