Epidermal Derivatives

Question 1

epidermal derivatives (epidermal appendages)

Answer 1

integumentary structures derived from the epidermis

Question 2

structures

Answer 2

nails, hair, exocrine glands of the skin

Question 3

nails

Answer 3

scalelike modifications of the stratum corneum

Question 4

functions of the nails

Answer 4

protect dorsal tips of fingers or toes and help with grasp

Question 5

nail root

Answer 5

imbedded in the skin, can’t see superficially, producing new cells

Question 6

nail bed

Answer 6

skin deep to the nail

Question 7

nail groove

Answer 7

nail meets skin

Question 8

nail fold

Answer 8

sticks up, later to groove

Question 9

cuticle

Answer 9

proximal end, thin strip of tissue

Question 10

body

Answer 10

everything other than root, not imbedded in skin

Question 11

lanula/lanule

Answer 11

white, crescent shaped, blood vessels are blocked

Question 12

free edge

Answer 12

the white that you file or cut

Question 13

hair zones

Answer 13

root, shaft, bulb

Question 14

root

Answer 14

deep to skin, imbedded in skin

Question 15

shaft

Answer 15

superficial to skin

Question 16

bulb

Answer 16

base of hair, cells undergoing mitosis, older cells pushed outwards causing growth

Question 17

inner layer of hair

Answer 17

medulla, deepest

Question 18

middle layer of hair

Answer 18

cortex, superficial to medulla

Question 19

outer layer of hair

Answer 19

cuticle, outer most layer

Question 20

hair follicle

Answer 20

space or cavity in the skin where hair is found

Question 21

arrector pili muscles

Answer 21

goosebumps, makes hair stand up

Question 22

two types of exocrine glands

Answer 22

sweat (sudoriferous) glands and sebaceous glands

Question 23

sweat (sudoriferous) glands

Answer 23

merocrine/eccrine sweat glands: coil tubes that have ducts that travel directly to surface of skin
watery sweat
shouldn’t be an odor, used to cool the body

Question 24

functions of the sweat (sudoriferous) glands

Answer 24

thermoregulation and protection

Question 25

apocrine sweat glands

Answer 25

coiled tubes, ducts open into hair follicles
armpit, groin, and anal region (smelly sweat)

Question 26

sebaceous glands

Answer 26

found on skin, secrete oily sebum into hair follicles or directly onto skin surface
acne or backed up gland