5. integumentary system (skin) Flashcards
produce sebum and prevent evaporation
oil glands
sebaceous gland
sweat glands
evaporate removes large quantities of heat
sudoriferous gland
nerve ending allow us to feel touch and pressure
Merkel cell
part of hair that is seen outside of the body
hair shaft
contains cells that produce hair
hair follicle
(90% of epidermis)
make keratin, a tough fibrous protein.
protect skin from damage, microbes, chemicals, provide water resistance
keratinocytes
contains DNA
hair root
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
attrector pilli
nerves that detect movement of hair
plexus
contains cells that make new hair
follicle
long part of the hair (that you can see)
shaft
newest part of the hair (inside your skin) and contains DNA
root
distal part of the nail (the part that you cut)
body
cells that produce new nail tissue
matrix
thickest part of the nail, so it looks whiter
lunula
the newest part of the nail
root
low tissue oxygen levels turns skin blue
cyanosis
white skin due to lack of blood flow or vasoconstriction of blood vessels
pallor
absorbs UV light, offers some protection against radiation damage
melanin
dark areas of skin due to excess melanin production
freckles/ age spot
genetic defect, missing protein converting enzyme, can’t make melanin
albinism
excessive growth of melanocytes in epidermis (stratum basale layer)
mole
pigment found in red blood cells, turns them red
heme
made from vitamin A(stored in fat tissue, turns skin orange)
carotene
yellow skin, commonly due to liver disease or by an immature liver (newborns)
jaundice
what type connective tissue is subcutaneous layer of skin made of
adipose tissue
caused by bacteria
hair follicle and oil gland infection in teens.
acne
fungal infection between toes
cancer caused by UV exposure
contagious
athlete’s foot
caused by bacteria, staph infection in dermis or hair follicle causing raised painful red swollen area containing dead cells.
boils
cancer caused by UV exposure
caused by bleeding under skin
bruise
cancer caused by UV exposure
burn that causes redness, heals in 2 days
burns- 1st degree
burn that causes blister, heals in 1-4 weeks
cancer caused by UV exposure
burns - 2nd degree
burn that destroys skin, nerves, vessels. charred
cancer caused by UV exposure
burns -3rd degree.
cancer caused by UV exposure
most commons type of cancer
surface
cancer:basal cell
cancer caused by UV exposure
cancer caused by tobacco usage
surface
cancer: squamous cell
cancer caused by UV exposure
most malignant type of cancer
deep
cancer: melanoma
cancer caused by UV exposure
bacterial infection of (subcutaneous) skin, entry through wound.
caused by bacteria
cellulitis
caused by allergies reaction of skin due to direct contact with allergen. (poison ivy)
cancer caused by UV exposure
contact dermatitis
cancer caused by UV exposure
caused by excessive friction on skin
corn/calluses
cancer caused by UV exposure
caused by prolonged pressure on skin
decubitus ulcers
cancer caused by UV exposure
inflammatory, red, watery, crusting, itch/burning
eczema
caused by bacteria
inflamed, infected hair follicles (shaving)
folliculitis
caused by viruses
cancer caused by UV exposure
contagious
causes cold sores, triggered by UV, stress
herpes simplex
caused by insects.
cancer caused by UV exposure
“wheals” red swollen patches, allergy related
hives
caused by bacteria
contagious parasitic insect infection usually in hair. (“crabs”-public hair)
lice
patches of thick red flaky skin, dry, silvery scales.
chronic skin inflammation.
not contagious.
psoriasis
fungal infection raised red ringed patch on skin
cancer caused by UV exposure
contagious
caused by fungl
ringworm
chronic inflammation of blood vessels and hair follicles.
red swollen middle part of face
rosacea
invisible mites burrow under skin, intense itch
caused by insects
contagious
cancer caused by UV exposure
scabies
autoimmune, excessive connective tissue production
cancer caused by UV exposure
“hard skin”
scleroderma
reactivation of herpes zoster. painful, itchy,blistered, red, unilateral rash on skin.
caused by viruses
contagious if have not had chicken pox.
shingles
cancer caused by UV exposure
“planter’s warts”
causes by viruses
infection caused a thicken/raised area on skin or mucus membranes.
contagious
warts
cancer caused by UV exposure
caused by excessive friction in skin
skin tags
used to deliver medications through skin
(nicotine, hormones)
stay 2inches away from them.
transdermal patches
asymmetry- not round
border : irregular edge, uneven border
color: uneven color, different shades or darker than other moles in same area
diameter: often bigger than 1/4 inch (pencil eraser)
elevated: rasied or bumpy (common moles are smooth)
fast growing: common moles do not noticeably grow.
6 signs of malignant/ skin cancer
“bed sore”
pressure causes reduce blood supply to the point that skin cells DIE!!
seen in bedridden patients, casts or wheel chairs.
common see at site of BONY projections (elbows, ankles, buttocks)
decubitus ulcers
bacterial infection causing raised, fluid filled sores that itch/burn.
contagious infection of skin in kids, mouth, nose and hands
thru contaminated objects, linens, surfaces.
impetigo
“dandruff”
dry scaly epithelial skin tissue
seborrheic dermatitis
small, fluid filled areas under the skin filled with sebum and dead skin cells, mobile; can get infected.
sebaceous cysts
cysts:a fluid filled bag
sweat gland, coolant. odor free.
eccrine
excessive hair due to excess androgen hormone.
hirsutism
hormones that promote hair growth.
androgen
makes new skin cells
basal cells.
sweat glands, caused odor.
apocrine
(not found in palms or soles of feet.) (too slippery)
waterproof, inhibit microbe growth.
oil glands