Chapter 2 (1) Flashcards
what is dermatology
medical specialty that studies the anatomy and physiology of the integumentary system
what does the integumentary system consist of
the skin, nails, and subcutaneous tissue
what are the functions of the integumentary system
protection, repair, sensation, synthesis of vitamin D, and thermoregulation
integument/o
skin
-ary
pertaining to
cutane/o
skin
-ous
pertaining to
what are the two layers of the skin
epidermis
dermis
what is the epidermis made of
epithelial tissues
what is the adj for epidermis
epidermal
what is the dermis made of
connective tissue
what is the adj for dermis
dermal
what are the abbreviations for subcutaneous
SQ
sub-Q
subcu
what is another name for subcutaneous tissue
hypodermis
what is the hypodermis composed of
adipose tissue
loose areolar tissue
what causes the thickness variation in the subcutaneous tissue
amount of fat stored
what is dermatitis
any infection or inflammation of the skin
what is edema
swelling from excessive amounts of fluid that move from the blood into the dermis or subQ
what is it called when pressure on a place of edema displaces the tissue fluid and produces an indentation
pitting edema
what is a hemorrhage
injury to the blood vessels that releases blood into the skin
hem/o
blood
-rrhage
excessive flow
what is a lesion
any area of visible damage on the skin or a variation from normal skin
what is a cyst
elevated circular mound
what is the color of a cyst
skin color or erythema
what are the contents of a cyst
semisolid or partly fluid filled
what are two examples of cysts
acne
sebaceous cyst
what is a fissure
small, cracklike crevice
what is the color of a fissure
erythema
what is a fissure filled with
nothing
what is an example of a fissure
dry, chapped skin
what is a macule
flat circle
what color is a macule
pigmented brown or black
what are two examples of macules
freckle
age spot
what is a papule
elevated part of skin
what is the color of a papule
skin color or erythema
is a papule solid or liquid filled
solid
what is an example of a papule
acne pimple
what is a pustule
elevated part of skin
what color is a pustule
white top
what is a pustule filled with
pus
what is an example of a pustule
acne whitehead
what is a scale
flat to slightly elevated, thin flake
what color is a scale
white
what are two examples of a scale
dandruff
psoriasis
what is a vesicle
elevated with pointed top
what is the color of a vesicle
erythema with transparent top
what is a vesicle filled with
clear fluid
what are three examples of vesicles
herpes
chickenpox
shingles
what is a wheal
elevated with broad, flat top
what color is a wheal
erythema with a pale top
what is a wheal filled with
clear fluid
what are two examples of wheals
insect bites
urticaria
what is neoplasm
new growth on the skin, benign or malignant
neo-
new
-plasm
growth
what is pruritus
the condition of itching
what causes pruritus
many diseases, especially allergic reactions on the skin
what is a rash
a red or pink skin lesion that is flat or raised, itchy or not itchy
what is xeroderma
excessively dry skin
xer/o-
dry
-derma
skin
where are melanocytes located
epidermis
what do melanocytes produce
the pigment melanin
what does melanin do
absorb sun’s UV light
what causes sunburn to occur
when melanocytes cannot absorb all the UV light
melan/o-
black
-cyte
cell
what causes differences in skin tone
amount of melanin
number of melanocytes do not differ
what is albinism
genetic mutation in which melanocytes do not produce melanin
what does albinism result in
lack of coloration of the skin, hair, and eye
albin/o
white
-ism
disease from a specific cause
what is cyanosis
a bluish-purple discoloration of the skin and nails
cyan/o-
blue
-osis
condition, process
what is erythema
red discoloration of the skin that can be local or over a large area
eryth/o-
red
-ema
condition
what is jaundice
yellowish discoloration of the skin, mucous membranes, and sclera due to inability of the liver to process bilirubin
jaund/o
yellow
-ice
state
what is necrosis
gray-to-black discoloration of the skin due to skin death from a burn, ulcer, wound, or poor blood supply
necr/o-
dead tissue
-osis
condition, process
what is vitiligo
autoimmune disease in which melanocytes are slowly destroyed and patches of depigmentation appear
what kind of disorder is vitiligo
progressive disorder
what does vitum mean
defect
what can severe frostbite cause
necrosis
what is gangrene
bacterial infection
what is an abrasion
sliding or scraping injury that mechanically removes the epidermis
abras/o
scrape off
-ion
action, condition
what is a blister
fluid-filled sac with a thin, transparent covering of epidermal cells; caused by repetitive rubbing injury
what is a blister filled with
interstitial fluid
what is a burn
caused by heat, hot objects, steam, boiling water, electricity, chemicals, and radiation
what are three types of burns
superficial (1st degree)
partial-thickness (2nd degree)
full thickness (3rd degree)
if there is a blister, what degree burn is it
second degree
what is a callus
thickened, elevated pad on the dermis caused by repetitive rubbing
what is a cicatrix
collagen that forms as an injury heals
a scar
what is an excoriation
superficial injury with a sharp object that creates a linear scratch on the skin
what is a keloid
firm abnormally large scar that grows larger than the original injury due to the overproduction of collagen
kel/o
tumor
-oid
resembling