integumentary system Flashcards
sweat glnads
remove waste
cools body
hair follicles
surrounds root of hair
shaft
part of a hair projecting beyond the surface of the skin
root
hair embedded within follicle
free edge
protrudes from nail bed
lunula
white near cuticle
defines free edge
cuticle
delicate skin that protects new nails from bacteria when they grow out from the nail root
nail root
below the skin
pores
small openings in the skin in which oil and sweat reach the surface from their respective glands below
eccrine
sweat gland found all over skin
apocrine
scent glands
usually have an odor.
integumentary system
external layer/covering
skin
protects outside of body
epidermis
outermost layer of skin
dermis
middle layer of skin
hypodermis
deepest layer of skin
thick skin
on hands & feet
keratin
protein that makes up hair
keratinocyte
produces keratin
stratum basale
continually divide and replace the rest of the epidermis as it wears away
“base”
stratum spinosum
prickle cells over the layer of the stratum basale capable of undergoing mitosis
stratum granulosum
layer of granular nondividing cells lying immediately above the stratum basale in most parts of the epidermis.
stratum lucidum
palms/soles of the feet & hands
stratum corneum
horny outer layer of the skin
5 layers of epidermis (superficial to deep)
corneum, lucidum, granulosum, basale
Squamous Cell Cancer
large white bump
2nd most common
caused by sun exposure & genes
melanoma
cancer formed in melanocytes
causes discoloration
eczema
skin rash
genetic
1st degree skin burn
least serious
superficial
sunburns
heal in time
2nd degree skin burn
affects first & second layer of skin
clean & bandage
blisters
most painful
3rd degree skin burns
worse than look
all nerves dead
reaches hypodermis
4th degree skin burns
most traumatizing
