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MT Chapter 2
Term | Definition |
---|---|
What are all the structures in the integumentary system? | Skin, Hair, Nails, Sweat glands, Sebaceous (oil) glands |
What are the 4 main functions of the integumentary system? | Protect the body from injury and intrusion of microorganisms, helps regulate body temperature, and houses receptors for the senses of touch, pressure and pain |
What are the 3 layers of the skin? | epidermis dermis subcutaneous layer |
keratin | a hard protein substance |
adip/o | fat |
corne/o | horn, hard |
cutane/o | skin |
melan/o | black |
derm/o, dermat/o | skin |
hidr/o | sweat |
onych/o | nail |
purpur/o | purple |
scler/o | hard |
trich/o | hair |
epithelium | cellular avascular layer covering external and internal surfaces of the body |
epidermis | outer layer of the skin |
stratum corneum | the outer layer of the epidermis, made up of several layers of flat keratinized (hard, proteinaceous) cells |
melanin | dark brown to black pigment contained in melanocytes |
collagen | protein substance in skin and connective tissue |
What is made of kerarin? | Hair and nails |
What is the outer most layer of the epidermis? | stratum corneum |
lesion | an area of pathologically altered tissue |
What are the types of lesions? | primary secondary vascular purpuric |
primary lesions | lesions arising from previously normal skin |
patch | a flat, discolored area on the skin larger than 1 cm |
tumor | a solid mass larger than 1–2 cm |
excoriation | a scratch mark |
fissure | a linear crack in the skin |
cherry angioma | a small, round, bright red blood vessel tumor on the skin, seen mostly in people over age 30 |
A mole is called a | nevus |
A freckle is an example of a | macule/macula |
rash | a general term for skin eruption |
skin pigmentation | skin color resulting from the presence of melanin |
depigmentation | loss of melanin pigment in the skin |
hypopigmentation | areas of skin lacking color because of deficient amounts of melanin |
What is baldness, or lack/ deficiency of hair? | alopecia |