Integumentary system Flashcards
What is the integumentary system?
Protects bod from loss of water or abrasion
(Makes up skin and it’s appendages)
Skin layer
1. Epidermis
-Outer layer
-Waterproof
-Keeps out pathogens
-Elastic
-Gives skin its colour
Skin layer
2.dermis
-middle layer
-contains hair follicles, nerves, blood vessels and glands
-regulates body temperature
Skin layer
3. Subcutaneous layer
-Inner layer
-provides insulation
-high amount of fat
-made of connective tissue
what are the 3 skin glands
-sudoriferous
-sebaceous
-ceruminous
skin gland
-sudoriferous
secrete sweat
skin gland
-subaceous
secrete sebum- keeps hair lubricate
skin gland
-ceruminous
specialized sudoriferous glands -secretes ear wax
nails
-nail matrix forms on top of dermis layer
-the root of the nails grows from the thick layer of matrix
claws and hooves
made of section of dermis which is covered in a layer of keratinized epithelium
horns
are made from cone keratin which surrounds mass of bone
antlers
are bone young antlers covered in velvety skin which is rubbed off as the antlers develop
the bone turns into a compact bone tissue as they mature
what is the contour feather?
gives shape and colour
also helps insulate
what is the down feather?
soft and fluffy
helps insulate bird
what is the semiplume feather?
found under the contour feather
used for insulation
