Chapter 3, Skin Flashcards
adip/o
fat
lip/o
fat
steat/o
fat
derm/o
skin
dermat/o
skin
cutane/o
skin
erythr/o
red
hidr/o
sweat
hist/o
tissue
histi/o
tissue
kerat/o
hard
leuk/o
white
melan/o
black
myc/o
fungus
onych/o
nail
plas/o
formation
purpur/o
purple
scler/o
hard
seb/o
sebum (oil)
squam/o
scale
trich/o
hair
xanth/o
yellow
xer/o
dry
epithelium
cells covering external and internal surfaces of the body
epidermis
thin outer layer of the skin
squamous cell layer
flat, scale-like epithelial cells comprising the outermost epidermis
basal layer
deepest layer of epidermis
melanocyte
cell in the basal layer that gives color to the skin
melanin
dark brown to black pigment contained in melanocytes
dermis
dense, fibrous connective tissue layer of the skin, also known as corium
sebaceous gland
oil glands in the skin
sebum
oily substance secreted by the sebaceous glands
sudoriferous glands
sweat glands
subcutaneous layer
connective and adipose tissue layer just under the dermis
collagen
protein substance in skin and connective tissue
hair
outgrowth of the skin composed of keratin
nail
outgrowth of the skin composed of keratin, at the end of each finger and toe
keratin
hard protein material found in the epidermis, hair, and nails
lesion
an area of pathology altered tissue; the two types of lesions are primary and secondary
primary lesion
lesions arising from previously normal skin
macula or macula
a flat, discolored spot on the skin to 1cm across (e.g. a freckle)
patch
a flat, discolored are on the skin larger than 1 cm (e.g., vitiligo)
papule
a solid mass on the skin up to 0.5cm in diameter (e.g., a nevus [mole])
plaque
a solid mass greater than 1 cm in diameter and limited to the surface of the skin.
nodule
a solid mass greater than 1 cm that extends deeper into the epidermis
tumor
a solid mass larger than 1-2 cm
wheal
an area of localized skin edema (swelling) (e.g., a hive)
vesicle
little bladder; an elevated, fluid-filled sac (blister) within or under the epidermis up to 0.5 cm in diameter (e.g., a fever blister)
bulla
a blister larger than 0.5 cm (e.g., a second-degree burn)
pustule
a pus-filled sac (e.g., a pimple)
secondary lesions
lesions that result in changes in primary lesions
erosion
gnawed away; loss of superficial epidermis, leaving an area of moisture but no bleeding (e.g., area if moisture after rupture of a vesicle)
ulcer
an open sore in the skin or mucous membrane that can bleed and scar; sometimes accompanied by infection (e.g., decubitus ulcer)
excoriation
a scratch mark
fissure
a linear crack in the skin
scale
a thin flake of exfoliated epidermis (e.g., dandruff)
crust
a dried residue of serum (body liquid), pus, or blood in the skin (e.g., as seen in impetigo)
vascular lesions
lesions of a blood vessel
cherry angioma
a small, round, bright red blood vessel tumor on the skin, often on the trunk of the elderly
telangiectasia, spider angioma
a tiny, red blood vessel lesion formed by the dilation of a group of blood vessels radiating from a central arteriole, most commonly on the face, neck, or chest
purpuric lesions
purpura; lesions resulting from hemorrhages into the skin