integumentary system

Question 1

skin

Answer 1

largest organ

Question 2

epidermis

Answer 2

protects against germs and provides skin color (melanocytes)

Question 3

dermis

Answer 3

sweat production, hair growth, skin sensations

Question 4

hypodermis layer

Answer 4

protects muscles and bones, and manages body temperature
subcutaneous layer

Question 5

common skin conditions

Answer 5

1. skin cancer
2. cellulitis
3. eczema
4. dermatitis

Question 6

skin health

Answer 6

stop smoking
drink plenty of water
use sunscreen daily
avoid sun exposure (10am to 2pm)

Question 7

hair

Answer 7

protein called keratin

Question 8

hair shaft

Answer 8

visible part of the hair above the skin
1. medulla
2. cortex
3. cuticle

Question 9

hair follicle

Answer 9

tubelike structure that keeps your hair in place

Question 10

hair bulb

Answer 10

base of the hair follicle. the enlarged, lowest part of the hair follicle where active hair growth begins

Question 11

melanocytes

Answer 11

this produces the pigment called melanin

Question 12

hair functions

Answer 12

1. sensory function
2. thermoregulation
3. protection

Question 13

dandruff

Answer 13

seborrheic dermatitis

Question 14

nails

Answer 14

form as layers of keratin
appears at the dorsal tips of the fingers and toes

Question 15

nail plate

Answer 15

hard visible portion
dead keratinized cells

Question 16

nail bed

Answer 16

specialized layer of epidermis beneath the nail plate. rich in blood vessels
makes nails pink

Question 17

nail matrix

Answer 17

root of the nail
beneath the cuticle
produces new nail cells

Question 18

lunula

Answer 18

white crescent
barrier against infections

Question 19

cuticle

Answer 19

seals the nail in place

Question 20

nail folds

Answer 20

paronychium
proximal and lateral nail folds

Question 21

nail groove

Answer 21

keeps the nail in position

Question 22

hyponychium

Answer 22

layer beath the free edge
protective cells

Question 23

glands

Answer 23

release different substances, water salts oils and waxes

Question 24

4 types of integumentary glands

Answer 24

1. sweat glands (sudoriferous glands

Question 25

2 types of sweat glands

Answer 25

1. eccrine - thermoregulation 2. apocrine - deeper than eccrine. controlled by nerves and hormones (hairy areas)

Question 26

sebaceous glands

Answer 26

oil glands secrete sebum waterproofs the skin and hair

Question 27

ceruminous glands

Answer 27

traps dirt only in ear canal (cerumen; earwax) antimicrobial properties