Skin Flashcards
layers of skin
epidermis
dermis
hypodermis
skin functions
protection / water barrier
immunity
thermoregulation / sweat
sensation
storage
how does the skin protect
acid mantle suppresses bacterial growth
moisture / water barrier
what is stored in skin?
vitamin D
lipids
water
blood
characteristics of the epidermis
outer layer of skin
repairs and regenerates every 28d
layers of the epidermis
stratum:
corneum
lucidum
granulosum
spinosum
basale
functions of the epidermis
protective
synthesis of vitamin D
maintain contact with the dermis
pigmentation
allergic recoginition
what cells recognize allergens? what layer?
langerhans
epidermis
what cells provide pigmentation? what layer?
melanocytes
epidermis
characteristics of the dermis
two layered
collagen, reticulum, elastin fibers
nerve endings
blood vessels
lymphatics
capillaries
hair/nails
sweat/sebaceous glands
what are the layers of the dermis
papillary
reticular
function of the dermis
support
mechanical strength
supplies nutrients/oxygen
inflammatory response
characteristics of the hypodermis
adipose/connective tissue
blood vessels
nerves
lymphatic vessels
function of hypodermis
attach to underlying tissue
structure/insulation
body shape
shock absorption
what happens to the dermis in natural aging
20% decrease
