Chapter 3: Integumentary System Flashcards
What is the largest organ in the body?
skin
Where are the sensory receptors located?
Within the middle layer of the skin
What dot the sensory receptors detect?
Temperature
Pain
Touch
Pressure
What are sweat glands?
They assist body in maintaining internal temperature that creates a cooling effect when sweat evaporates.
What are sebaceous glands?
They are oil glands that lubricate the skin surface and produces sebum.
How does the skin cool?
Sweat evaporation
Dilate superficial blood vessels to release heat
How does the skin conserve heat?
Constrict superficial blood vessels to keep warm blood away from surface.
Continuous fat layer acts as insulation.
What are the three layers of the skin?
Epidermis
Dermis
Subcutaneous layer
Epidermis
Thin, outer membrane layer composed of flat like cells arranged in strata. Has no blood supply or connective tissue
Dermis
Middle, fibrous connective tissue layer composed of connective tissue and collagen fibers, giving it flexible strength. Has very good blood supply.
Subcutaneous layer
innermost layer of fatty tissue, composed of lipocytes and acts as insulation for heat/cold.
Basal Layer
The deepest layer in the epidermis. Cells continuously grow and push out the old cells toward the surface that shrink die, and fill with keratin.
Keratin
a hard protein in dead cells that allow skin to act as a barrier to infection
Melanocytes
Special cells of the basal layer that produces melanin which gives skin color and protects against ultraviolet rays.
What organs are located in the Dermis?
Hair
Nails
Sweat glands
Sebaceous glands
What are the 4 parts of the hair?
Hair follicle
Hair root
Hair shaft
Arrector pili muscle
How is the hair shaft formed?
Within the hair follicle, deep cells of hair root force older cells to move upward towards surface
What gives hair its color?
melanin
Arrector Pili
Slip of smooth muscle that causes hair to “stand up”
What are the 6 parts of the nail?
Nail body Nail bed lunula nail root cuticle free edge
What is the Nail Body?
Flat plate of keratin
What is the nail bed?
Connects nail body to underlying tissue
What is the cuticle?
Soft tissue that covers nail root.
Where does sweat travel to int he sweat gland?
To surface in sweat duct.
Apocrine Glands
Found in the pubic or underarm areas that produces an odor when sweating.
cutaneous
pertaining to the skin
dermal
pertaining to the skin
epidermal
pertaining to upon the skin
hypodermic
pertaining to under the skin
intradermal
pertaining to within the skin
subcutaneous
pertaining to under the skin
ungual
pertaining to the nail
abrasion
friction scraping away skin surface
anhidrosis
condition of producing no sweat
comedo
hardened sebum in hair follicle; blackhead
contusion
injury caused by a blow; causes swelling, pain, and bruising
cyanosis
bluish tint to the skin caused by deoxygenated blood
cyst
fluid-filled sac under the skin
depigmentation
loss of normal skin color
diaphoresis
profuse sweating
ecchymosis
blood collecting under the skin following blunt trauma; a bruise
erythema
red flushing of the skin
erythroderma
having reddened or flushed skin
eschar
thick layer of dead tissue develops over a deep burn area
fissure
crack-like lesion on skin
hirsutism
excessive hair growth
hyperemia
redness of skin due to increased blood flow
hyperhidrosis
excessive sweating
hyperpigmentation
abnormal amount of pigmentation
ichthyoderma
scaly and dry skin
lesion
general term for injury or abnormality
leukoderma
white skin from lack of skin pigment
lipoma
fatty mass
macule
flat, discolored spot on skin
necrosis
condition of cell or tissue death
nevus
pigmented skin blemish, birthmark, or mole; usually benign
nodule
form, solid mass larger than 0.5 cm
onychomalacia
softening of nails
pailor
abnormal paleness of skin
papule
small, solid raised spot smaller than 0.5 cm
petechiae
spots from minute hemorrhages under skin
photosenitivity
skin reacts abnormally to light
pruritus
severe itching
purpura
skin hemorrhage due to fragile blood vessels
purrlent
infection producing pus; dead bacteria, white blood cells, and tissue debris
pustule
raised spot on skin containing pus
pyoderma
having pus on or within the skin
scleroderma
hardened skin
seborrhea
oily discharge
suppurative
containing or producing pus
ulcer
open sore in skin
urticaria
hives; eruption of wheals with severe itching
vesicle
small, fluid-filled, raised spot; blister
wheal
small, round, swollen area; typical of allergic skin reaction
xeroderma
abnormally dry skin
abscess
collection of pus in skin
acne
inflammation of sebaceous glands and hair follicles with papules and pustules
acne rosacea
chronic form of adult acne with redness and tiny pimples, primarily on nose
acne vulgaris
common form of teenage acne with comedo, papules, and pustulates
albinism
genetic condition; unable to make melanin; white hair and skin, and red eyes
basal cell carcinoma
cancerous tumor in basal skin layer; common cancer; rarely metastasizes
burn
skin damage caused by fire, electricity, ultraviolet light, or caustic chemicals; percentage of skin burned is estimated by Rule of Nines
First Degree Burn
skin reddened and painful; no blisters; damage to epidermis
Second degree burn
skin reddened and painful with blisters; damage to epidermis and dermis
Third degree burn
skin charred; epidermis and dermis burned away; subcutaneous layer exposed
celluitis
diffuse acute infection of connective tissue of skin
cicatrix
normal scar
decubitis ulcer
open sore caused by pressure over bony prominences; caused by loss of blood flow to skin
dermatitis
inflammation of the skin
dermatosis
presence of a skin condition
dry gangrene
late stages of gangrene; affected area becomes dried, blackened, and shriveled
eczema
superficial dermatitis; redness, vesicles, itching, and crusting
gangrene
tissue necrosis due to loss of blood flow
ichthyosis
skin becomes dry, scaly, and keratinized
impetigo
highly infections bacterial infection with pustules that rupture and crust over
Kaposi’s sarcoma
skin cancer seen in AIDS patients; brownish-purple lesions
keloid
thick hypertrophic scar
keratosis
condition of excessive growth and thickening of epidermis layer
laceration
torn or jagged wound
malignant melanoma (MM)
dangerous form of cancer; begins in melanocytes; quickly metastasizes
pediculosis
lice infestation
psoriasis
chronic inflammatory condition with papules forming “silvery scale” patches
rubella
contagious viral infection; german measles
scabies
mite infection
sebaceous cyst
sebum filled sac forms around sebaceous gland
squamous cell carcinoma (SCC)
cancer of epidermis layer; may invade deeper tissue and metastasizes
strawberry hemangioma
congenital collection of dilated blood vessels; birthmark
systemic lupus erythematosus (SLE)
chronic disease of connective tissue; injures skin, joints and kidneys; produces red, scaly butterfly rash across face
tinea
fungal infection; itching and scaling lesions
tinea captis
fungal infection on scalp; ringworm
tinea pedis
fungal infection of foot; athlete’s foot
varicella
contagious viral infection; chickenpox
verruca
warts; benign growth caused by a virus
vitillgo
disappearance of pigment from skin in patches; causes milk-white lesions
wet gangrene
area of gangrene with secondary bacterial infection and pus
alopecia
absence or loss of hair; baldness
carbuncle
furuncle involving several hair follicles
furuncle
bacterial infection of hair follicle; reddened, pain, and swelling; a boil
trichomycosis
fungal infection of hair
onychia
infected nail bed
onychomycosis
fungal infection of nail
onychophagia
nail biting
paronychia
infection of skin fold around nail
Culture and Sensitivity (C&S)
grows bacteria removed from infected area to identify infecting bacteria; then determines sensitivity to various antibiotics
biposy
removal of piece of tissue to examine under a microscope; aids in diagnosis
exfoliative cytology
scraping cells from tissue to examine under micrscope
frozen section
thin piece of tissue is cut from frozen specimen for rapid examination under microscope
fungal scrapings
scrapings from lesion is cultured and then examined under microscope
skin graft
transfer of skin from one normal area to cover another site
allograft
skin graft from one person to another, also called homograft
autograft
skin graft from one person’s own body
xenograft
skin graft from an animal of another species; usually a pig; also called a heterograft
dermatome
instrument for cutting sin or for producing thin transplants of skin
dermatoplasty
skin grafting
cauterization
destruction of tissue by using chemicals, electricity, heat, or freezing
cryosurgery
use of extreme cold to freeze and destroy tissue
curettage
removal of superficial skin lesion with a scraper
debridement
removal of foreign material and dead or damage tissue from wound
electrocautery
using an electric current to destroy tissue
incision and drainage
making and incision to drain material such as pus
onychetomy
surgical removal of a nail
chemabrasion
abrasions using chemicals; chemical peel
dermabrasion
abrasion using wire brushes or sandpaper; removes scars, tattoos
laser therapy
removal of lesion using a laser beam
liposuction
removal of fat beneath skin by means of suction
rhytidectomy
surgical removal of excess skin to eliminate wrinkles; face lift
anesthetic
deaden pain
antibiotic
kill bacteria
antifungal
kill fungi
antiparasitic
kill mites or lice
antipruritic
reduce severe itching
antispetic
kill bateria
anti-viral
treat herpes simplex infection
corticosteroid cream
powerful anti-inflammatory
What are the organs of the integumentary system?
Skin Hair Nails Sweat Glands Sebaceous glands