Integumentary System

skin

largest organ of the body

epidermis

outermost skin layer

dermis

layer with vessels and nerves and glands

subcutaneous layer

fatty layer under the dermis

keratin

hard protein in skin and hair and nails

melanin

dark skin pigment

melanocyte

cell that makes melanin

collagen

protein that gives skin strength

sebum

oil from sebaceous glands

sebaceous gland

secretes oil

sudoriferous gland

sweat gland

hair follicle

sac that holds the hair root

macule

flat discolored spot

papule

small raised bump

vesicle

small fluid filled blister

bulla

large blister

pustule

pus filled lesion

wheal

raised swelling like a hive

ulcer

open sore

fissure

crack in the skin

cyst

closed sac with fluid

scar

fibrous tissue that replaces normal skin

keloid

raised overgrown scar

erythema

redness

pallor

paleness

ecchymosis

bruise

petechiae

tiny pinpoint hemorrhages

pruritus

itching

urticaria

hives

diaphoresis

heavy sweating

xeroderma

dry skin

alopecia

hair loss

hirsutism

excessive hair growth

acne

inflammation of sebaceous glands

eczema

itchy inflamed skin

psoriasis

chronic silvery scaly patches

cellulitis

bacterial infection of skin and subcutaneous tissue

impetigo

contagious bacterial skin infection

tinea

fungal infection or ringworm

herpes zoster

shingles

scabies

skin infestation by mites

pediculosis

infestation with lice

decubitus ulcer

pressure sore

abscess

collection of pus

onychomycosis

fungal nail infection

melanoma

malignant tumor of melanocytes

basal cell carcinoma

most common skin cancer

squamous cell carcinoma

cancer of squamous cells

first degree burn

epidermis only

second degree burn

partial thickness with blisters

third degree burn

full thickness burn

rule of nines

estimates percent of body surface burned

ABCDE rule

asymmetry and border and color and diameter and evolution of a mole

biopsy

removal of tissue for examination

debridement

removal of dead tissue

skin graft

transfer of skin to cover a defect

cryosurgery

destroying tissue by freezing

laceration

torn or jagged wound

abrasion

scraping of the skin

dermatology

study of the skin