Integumentary System Structure Flashcards
1
Q
integument
A
- skin
- cutaneous membrane
2
Q
epidermis
A
superficial, thin, avascular layer of closely packed epithelial cells filled with keratin
3
Q
epidermis epithelium
A
keratinised, stratified, squamous
4
Q
epidermal cells
A
- keratinocytes
- melanocytes
- langerhans cells
- merkel cells
5
Q
keratinocytes
A
- 90% of epidermal cells
- arranged in 4-5 layers
- produce keratin and lamellar granules
6
Q
keratin
A
tough, fibrous protein that helps protect the skin and underlying tissues from abrasions, heat, microbes, and chemicals
7
Q
lamellar granules
A
water-proofing and preventing microbe entry
8
Q
melanocytes
A
- 8% of epidermal cells
- produce melanin and
carotene - transfer melanin to keratinocytes
- protection of nuclear DNA
from UV light damage
9
Q
langerhans cells
A
detect pathogens and activate an immune response
10
Q
merkel cells
A
detect sensations of touch
11
Q
epidermal layers
A
- stratum corneum
- stratum lucidum
- stratum granulosum
- stratum spinosum
- stratum basale
12
Q
dermis
A
dense, irregular CT with collagen fibres extending from one layer to the other
13
Q
dermal cells
A
- fibroblasts
- macrophages
- adipose cells
14
Q
fibroblasts
A
connective tissue building cells
15
Q
macrophages
A
phagocytes
