Flashcards in 5. integumentary system (skin) Deck (67)
produce sebum and prevent evaporation
evaporate removes large quantities of heat
nerve ending allow us to feel touch and pressure
part of hair that is seen outside of the body
contains cells that produce hair
(90% of epidermis)
make keratin, a tough fibrous protein.
protect skin from damage, microbes, chemicals, provide water resistance
contain mitochondria, endoplasmic reticulum and ribosomes.
composed of dead or degenerating keratinocytes.
secrete a fatty lipid substance used for waterproofing skin
continuously flakes off. may be seen as dandruff.
contain an extra layer in finger tips, soles of feet and palms.
top 3 layers of epidermis
stratum spinosum, germinativum (basale) layers of the dermis.
contains stem cells, keratinocytes, melanocytes and Merkel cells
bottom 2 layers of epidermis
caused "goose bumps" and makes hair stand up when you are cold
nerves that detect movement of hair
contains cells that make new hair
long part of the hair (that you can see)
newest part of the hair (inside your skin) and contains DNA
distal part of the nail (the part that you cut)
cells that produce new nail tissue
thickest part of the nail, so it looks whiter
the newest part of the nail
low tissue oxygen levels turns skin blue
white skin due to lack of blood flow or vasoconstriction of blood vessels
absorbs UV light, offers some protection against radiation damage
dark areas of skin due to excess melanin production
freckles/ age spot
genetic defect, missing protein converting enzyme, can't make melanin
excessive growth of melanocytes in epidermis (stratum basale layer)
pigment found in red blood cells, turns them red
made from vitamin A(stored in fat tissue, turns skin orange)
yellow skin, commonly due to liver disease or by an immature liver (newborns)
what type connective tissue is subcutaneous layer of skin made of
caused by bacteria
hair follicle and oil gland infection in teens.