Anatomy of Hair and Nails

Question 1

hair shaft

Answer 1

The portion of hair that projects above the epidermis

Question 2

hair cuticle

Answer 2

the outer layer of the hair shaft

Question 3

hair follicle

Answer 3

a small tubular cavity containing the root of a hair

Question 4

arrector pili

Answer 4

a smooth muscle attached to hair follicles that causes “goose bumps” to appear on the skin when contracted

Question 5

hair bulb

Answer 5

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

Question 6

nail matrix

Answer 6

the part of the nail beneath the body and root from which the nail is produced

Question 7

lunula

Answer 7

The half-moon-shaped, whitish area at the base of a nail

Question 8

Nail body (nail plate)

Answer 8

The visible nail area from the nail root to free edge. Made of layers. No nerves or blood vessels can be found here.

Question 9

nail fold (cuticle)

Answer 9

dead skin that is attached directly to the nail plate

Question 10

free edge of nail

Answer 10

the portion of the nail that grows out away from the body

Question 11

root of nail

Answer 11

the part that is embedded in the skin and adheres to an epithelial nail bed