Skin Flashcards
(43 cards)
What is the integumentary system
skin and other keratinous substances
How much of your body weight is skin
5-10%
What are the layers of skin
Epidermis, dermis, hypodermis
What are the strata of the epidermis
Basale, spinosum, granulosum, lucidum, corneum
Is the epidermis avascular?
Yes
What cells are in the epidermis
Melanocytes, dendritic cells and tactile cells
What is the skin classified as in term of epithelial cells
Stratidies squameous epithelium
What is the stratum baSALE
cONTinuously mitosic cells. Basement membrane
What is the stratum spinosum
Pre keratin filament
What is stratum granulosum
layer where keratination begins
What is lucidum layer
Layer where there are dead cells in thick skin
What is corneum
Layer where cells shed
How long does it take for epidermal cells to replace themselves
25 days to 8 weeks
What is dermis composed of
Composed of connective tissue and contains blood vessels
What does papillary layer compose of
Capillaries, nerve endings
What is the reticular layer compose of
Dense connective tissue, sebaceous and sweat glands produce hair follicles
What is the hypodermis composed of
Fat, primary purpose to store energy
what are flecure lines
dermal folds
what is striae
stretch marks
what is a blister
fluid filled pocket
What pigments contribute to skin colour
Melanin, carotene, haemoglobin
What triggers melanocytes
UV
What types of melanin are there
Eumelanin (black ppl)
Pheomelanin (white ppl)
Where is carotene from
Carrots
