Skin Accessory Structures

Question 1

Nails

Answer 1

1) . keratinized plates of flat epidermal cells
2) . protect the exposed tips of the fingers and toes and help limit distortion when the digits are subject to mechanical stress

Question 2

Hair

Answer 2

1) . keratinized epithelial tubes with hollow core

2) . sensation and thermal insulation

Question 3

Vellus hairs (peach fuzz)

Answer 3

found over much of the body surface

Question 4

intermediate hairs

Answer 4

upper and lower limbs

Question 5

terminal hairs

Answer 5

head, eyebrows, and eyelashes

Question 6

Sebaceous glands:

Answer 6

1) . discharge a waxy, oily secretion into hair follicles

2) . sebum secretion: provides lubrication for keratin, inhibits the growth of bacteria, and conditions the skin.

Question 7

Apocrine sweat glands:

Answer 7

-contractions of myoepithelial cells squeeze the gland and discharge the accumulated secretions.

1) . release secretions into armpits, nipples, and groin.
2) . coiled tubular glands

Question 8

Merocrine sweat glands

Answer 8

• contractions of myoepithelial cells squeeze the gland and discharge the accumulated secretions.
  1) . coiled tubular glands that discharge their secretions directly onto the surface of the skin