Descriptions: Hair Structure

Cuticle

• Outside covering of hair

• Deepest layer of hair containing large cells and air spaces

• Layer of flattened cells located deep to the cuticle but superficial to the medulla

• Muscle attached to the hair follicle.

• Lowest part of a hair strand; the thickened, club-shaped structure that forms the lower part of the hair root.

Medulla

• Outside covering of hair

• Deepest layer of hair containing large cells and air spaces

• Layer of flattened cells located deep to the cuticle but superficial to the medulla

• Muscle attached to the hair follicle.

• Lowest part of a hair strand; the thickened, club-shaped structure that forms the lower part of the hair root.

Cortex

• Outside covering of hair

• Deepest layer of hair containing large cells and air spaces

• Layer of flattened cells located deep to the cuticle but superficial to the medulla

• Muscle attached to the hair follicle.

• Lowest part of a hair strand; the thickened, club-shaped structure that forms the lower part of the hair root.

Arrector Pili

• Outside covering of hair

• Deepest layer of hair containing large cells and air spaces

• Layer of flattened cells located deep to the cuticle but superficial to the medulla

• Muscle attached to the hair follicle.

• Lowest part of a hair strand; the thickened, club-shaped structure that forms the lower part of the hair root.

Hair Bulb

• Outside covering of hair

• Deepest layer of hair containing large cells and air spaces

• Layer of flattened cells located deep to the cuticle but superficial to the medulla

• Muscle attached to the hair follicle.

• Lowest part of a hair strand; the thickened, club-shaped structure that forms the lower part of the hair root.

Hair Shaft

• Part of the hair that is visible on the scalp or skin.

• Part of hair that is enclosed in the hair follicle

• "Bag" that encloses the root of hair

• Octopus-shaped cell located deep in the hair bulb next to hair matrix superficial to hair papilla.

• Niddle-like structure of connective tissue containing capillaries and nerves

Hair Root

• Part of the hair that is visible on the scalp or skin.

• Part of hair that is enclosed in the hair follicle

• "Bag" that encloses the root of hair

• Octopus-shaped cell located deep in the hair bulb next to hair matrix superficial to hair papilla.

• Niddle-like structure of connective tissue containing capillaries and nerves

Hair Follicle

• Part of the hair that is visible on the scalp or skin.

• Part of hair that is enclosed in the hair follicle

• "Bag" that encloses the root of hair

• Octopus-shaped cell located deep in the hair bulb next to hair matrix superficial to hair papilla.

• Niddle-like structure of connective tissue containing capillaries and nerves

Melanocytes

• Part of the hair that is visible on the scalp or skin.

• Part of hair that is enclosed in the hair follicle

• "Bag" that encloses the root of hair

• Octopus-shaped cell located deep in the hair bulb next to hair matrix superficial to hair papilla.

• Niddle-like structure of connective tissue containing capillaries and nerves

Tags

NGSS.HS-LS1-4

Hair Papilla

• Area of the hair bulb known as the growth zone, lies next to melanocytes.

• Deepest layer of the follicle that covers the hair root directly composed of epithelial tissue.

• The superficial layer of the follicle that covers the hair root composed of dermal connective tissue.

• Octopus-shaped cell located deep in the hair bulb next to hair matrix superficial to hair papilla.

• Niddle-like structure of connective tissue containing capillaries and nerves