Integumentary Flashcards
define SKIN
protective layer covering external body surface
define SEBACEOUS GLANDS
secrete sebum, lubricates skin, & discourage bacteria growth
define HAIR
controls loss of body heat
aka: unguis
nails
define LUNULA
half moon region @ every nail root where new keratin cells form
define CUTICLE
narrow band of epidermis attached to nail to protect new keratin cells
define NAIL ROOT
fastens nail to finger via groove in skin
define EPIDERMIS
outermost layer of skin of 5 layers w/no vessels or connective tissue
define EPITHELIAL TISSUES
protective covering for all internal & external surfaces
describe SQUAMOUS EPITHELIAL TISSUE
makes up upper layer of dermis; flat, scaly cells continuously shed
describe KERATIN
fibrous, H2O repellent protein; soft & hard
define MELANOCYTES
cells that make melanin
aka: dermis
corium
define COLLAGEN
tough & flexible fibrous protein
define MAST CELLS
connective tissue of dermis that responds to injury, infection, allergy, & makes & releases substances (heparin & histamine)
define HEPARIN
anticoagulant that responds to injury
define HISTAMINE
causes symptoms of allergic responses
define SENSORY NERVE ENDINGS
sensory receptors for touch, temperature, pain & pressure
define SUBCUTANEOUS LAYER
connect skin to surface muscle made of connective & adipose tissue
define ECCRINE GLANDS
sudoriferous glands all over skin
define APOCRINE GLANDS
sudoriferous glands @ hair follicles
define PORES
openings on skin acting as sweat gland ducts
define PERSPIRATION
99% H2O & other waste products that cool body & interact w/bacteria on skin
define HIDROSIS
production & excretion of perspiration
define MAMMARY GLANDS
modified sweat glands
define GRANULATION TISSUE
normally forms during healing leading to a scar
define PYODERMA
any acute, inflammatory, pus-forming bacterial skin infection
define ACNE VULGARIS
chronic & inflammatory overproduction of sebum around shaft leading to pus
define COMEDO
non infected lesion from buildup of sebum & keratin in follicle w/acne vulgaris
define WHITEHEAD
comedo w/obstructed opening
define BLACKHEAD
oxidized sebum plug open to air
define EPIDERMOID CYST
closed sac found under skin w/yellow & fatty material in cyst gen on face/neck/trunk
aka: epidermoid cyst
sebaceous cyst
define SEBORRHEIC DERMATITIS
overactivity of sebaceous gland leading to inflammation, scaling, & itching of skin
describe SEBORRHEIC KERATOSIS
benign skin growth w/waxy or pasted on look varying in color; gen ppl +50 yrs
describe ANHIDROSIS
abnormal lack of sweat, @ risk for heat stroke
aka: anhidrosis
hypohidrosis
describe DIAPHORESIS
profuse sweating; normal w/heat, exertion, or distress
describe HEAT RASH
intense & itchy rash from sweat glands being blocked by bacteria & dead cells
aka: heat rash
prickly heat
describe HEAT STROKE
core temp at least 104F causing altered mental state, racing bpm, organ swelling, & death
aka: heat stroke
sunstroke
define HYPERHIDROSIS
excessive sweating
describe SLEEP HYPERHIDROSIS
hyperhidrosis during sleep from menopause, meds, or infectious disease
aka: sleep hyperhidrosis
night sweats
define FOLLICULITIS
inflammation of hair follicles common in arms, legs, or beard area
define TRICHOMYCOSIS AXILLARIS
superficial bacterial infection of hair shafts in areas w/extensive sweat glands
define HIRSUTISM
excessive body & facial hair in women
describe ALOPECIA
partial/complete loss of hair generally on scalp from genetics, age, illness, or drugs
aka: alopecia
baldness
define ALOPECIA AREATA
autoimmune gen w/kids where hair follicles attacked
define ALOPECIA TOTALIS
uncommon; total loss of all hair on scalp
define ALOPECIA UNIVERSALIS
total loss of hair on all parts of body
define ANDROGENIC ALOPECIA
most common; related to hormones associated w/male characteristics
describe the pattern: male & female pattern baldness
male: recede front to back in horseshoe shape
female: thinning
describe CLUBBING
abnormal curving of nails w/enlargement of finger bc hereditary or O2 deficiency from coronary/pulmonary disease
describe KOILONYCHIA
malformation of nails, outer surface concave/scooped out & gen indicate iron deficiency anemia
aka: koilonychia
spoon nail
describe ONYCHIA
inflammation of nail bed leading to loss of nail
aka: onychia
onychitis
describe ONYCHOCRYPTOSIS
nail curved inward & cut into skin leading to inflammation & infection
aka: onychocryptosis
ingrown nail
describe ONYCHOMYCOSIS
fungal infection of nail; nail turns white/yellow/green/black & thick & brittle
describe ONYCHOLYSIS
separation of nail plate from bed, generally painless; caused by localized allergic reaction, fungal infection, & psoriasis
define PARONYCHIA
acute/chronic infection of skin fold around nail
describe AGE SPOTS
spots from sun exposure; harmless but can resemble cancer
aka: age spots
solar lentigines or liver spots
describe ACANTHOSIS NIGRICANS
at least 1 area of skin that is dark & velvety gen in skin folds bc of cancer, type 2 diabetes, or med reaction
describe ALBINISM
genetic lack/absence of pigment in skin, hair & irises from missing enzyme for melanin making
define MELASMA
brownish spots on face during pregnancy gen in women w/dark hair & fair skin that usually disappear after birth
aka: melasma
chloasma or mask of pregnancy
describe VITILIGO
irregular patches of white skin/hair bc of destruction of melanocytes
describe CONTUSION
injury to tissue w/o breaking skin causing discoloration & pain
describe ECCHYMOSIS
large, irregular purple discoloration from bleeding under skin
aka: ecchymosis
bruise
describe PURPURA
purple/brownish-red rash from blood leaking into skin/mucous membranes that are smaller than ecchymosis & larger than petechiae
describe PETECHIAE
very small, pinpoint hemorrhage < 2 mm from high fevers
aka: petechiae
petechia
describe HEMATOMA
swelling of clotted blood trapped in tissue, the blood is eventually reabsorbed
define LESION
pathologic tissue change from disease/injury
define CRUST
hard, dried serum & blood as barrier over partial-thickness wound
aka: crust
scab
define ESCHAR
dead, crust-like tissue in full-thickness wound that is brown/black & a natural stage of healing
define EROSION
wearing away of surface
define MACULE
discolored flat spot < 1 cm diameter
aka: macule
macula
define NODULE
solid, raised lesion > 0.5 cm & deeper than papule
define PAPULE
small, raised, red lesion < 0.5 cm diameter & no pus (insect bites & small pimples)
define PLAQUE
scaly, solid raised area of close papules