Ch. 5 - Integumentary System Study Guide Flashcards
What is included in the integumentary system?
skin, hair, nails, glands
List the 5 functions of the integumentary system:
- Protection - from pathogens
- Regulate body temperature - blood vessels dilate/constrict
- Sensory receptors - nerves
- Excretion - elimination of body wastes - sweat
- Synthesis of Vitamin D - sunlight
study of skin
dermatology
What are the 2 layers of skin?
epidermis and dermis
Differences between epidermis and dermis:
epidermis: outer layer, no blood or nerve supply
dermis: inner, thicker layer under the epidermis
Under dermis, contains loose connective tissue (CT) and adipose (fat) tissue
hypodermis
Name 3 accessory structures:
hair, nails, glands
How does hair get its color?
Melanin produced by melanocytes
cyanosis
bluish discoloration of skin/nails
indicates decrease in oxygenation
What are three types of glands found in the skin?
sudoriferous glands
sebaceous glands
ceruminous glands
sudoriferous glands
found on almost all of the body surface
cools the body by evaporation and elimination of sweat products.
clear fluid, odorless
sweat
sebaceous glands
secretes sebum (oil), lubricates hair, keeps skin soft
ceruminous glands
produces cerumen (earwax)
a localized collection of pus
abscess
bluish-black discoloration of the skin
ecchymosis (bruise)
scraping or rubbing away skin or mucous membrane because of friction
abrasion
crack-like groove in the skin or mucous membrane
fissure
injury without a break in the skin
contusion
small, pinpoint hemorrhages
petechia
small, stalk-like growth that protrudes outward from a mucous membrane
polyp
skin tags
small brownish or flesh-colored outgrowths of the skin, often on the neck
oily secretion of a sebaceous gland
cebum (oil)
pruritus
itching
small, thin-walled skin lesion containing clear fluid
vesicle (blister)
tissue death due to loss of adequate blood supply, invasion of bacteria, producing a very offensive foul odor
gangrene
acute infection of the skin, hot, deep redness, pain, and swelling
cellulitis
a tear in the skin
laceration
absence of a pigment in the skin, hair and eyes
albinism
partial or complete loss of hair
alopecia
patches of white skin
vitiligo
benign mass of blood vessels
hemangioma
acne vulgaris
severe inflammatory disorder seen on the face, chest, back, and neck
(papules, pustules, and comedos (blackhead/whitehead)
burn degree is classified by depth of
injury
superficial (epidermis) burn
1st degree burn
partial thickness burn
2nd degree burn
full thickness (subcutaneous/muscle)
3rd degree burn
bone (burn)
4th degree burn
carcinoma
skin cancer
basal cell carcinoma
elevated nodule with a depression in the center
most common in areas exposed to the sun
rarely metastasize
tend to recur
squamous cell carcinoma
malignancy of squamous cells faster growing than basal cell potential for metastasis if not treated firm, flesh-colored or red papule sometimes with a crusted appearance tend to recur