Copy of integumentary system chapter 5 - Sheet1 Flashcards
skin
integument
integumentary system
skin with accessory organs - hair, nails, glands
What does the integumentary system do?
tissues with glands that produce secretionsn, nerves, blood vessels, that regulate body temperature
androgen
agent (hormone like testosterone or androsterone) that stimulates development of male characteristics, regulates sebum
doctule
very small duct duct; to lead;carry, ule - small minute
homeostasis
state of equilibrium of the internal env of the body despite changes in external env
sythesize
forming a complex substance by the union of simpler compounds or elements (skin synthesizes vit D)
epidermis
very thin outer layer of skin, thickest on palms and soles
strata
sublayers of epidermis
stratum corneum
part of epidermis but second down
basal layer
3rd deepest layer of epidermis and of greatest importance
keratin
hard protein material
melanocytes
special cells in basal layer of epiedermis which produce black pigment called melanin
melanin
black pigment in basal layer to ward of ultraviolet radiation
albino
inability to produce melanin (which produces black pigment)
dermis
2nd layer of skin, aka corium
corium
another name for dermis 2nd layer of skin
sebaceous glands
oil glands in the dermis
sudoriferous glands
sweat glands in the dermis
subcutaneous layer
aka hypodermis, binds dermis to underlying structures and is made of adipose tissue with blood vessels
hypodermis
aka subcutaneous layer
adipose
fat tissue with blood vessels holding subcutaneous (hypodermis) with underlying tissues
exocrine glands
secrete substances through ducts to an outer surface of the body rather than directly into blood stream
axillae
armpit
sebum
the oily secretion in cells perpired onto surface of skin
hair shaft
visible part of hair
hair follicle
part embedded in the dermis
pupilla
loop of capillaries enclosed in a covering
alopecia
baldness
nail root
keratinized stratified, squamous epithelial cells produce tough covering
nail bed
layer of epithelium
nail body
(nail plate) visible nail area from nail root to free edge.
lunula
region of new growth on nail
adip/o
fat
lip/o
fat
steat/o
fat
cutane/o, dermat/o, derm/o
skin
hidr/o
sweat
sudor/o
sweat
ichthy/o
dry, scaly
kerat/o
horny tissue; hard; cornea, keratin
melan/o
black
myc/o
fungus
onych/o
nail
ungu/o
nail
pi/o
hair (pil/o/nid/al -nid - nest - growth of hair in dermoid cyst
sclero
hardening; sclera
seb/o
sebum, sebaceous
squam/o
scale (squamous - pertaining to scales)
xen/o
foreign, strange
xer/o
dry, scaly
-derma
skin
py/o
pus
-therapy
treatment
lesions
areas of tissue that have been pathological altered by injury, wound, or infection
localized
definite size of lesion
systemic
lesions widely spread
primary skin lesions
intial reaction to pathologically altered tissue either flat or elevated
secondary skin lesions
changes that take place in primary lesion as a result of infection, scratching, trauma, or various stages of disease
macule
primary lesion flat, pigmented, circumscribed area less than 1cm in dia (ie rash in rubella)
papule
solid elevated lesion less than 1 cm dia (wart, pimple ringworm0
Nodule
solid elevated lesion larger and deeper than papule (2 cm) benign, malig tumor
tumor
solid elevatedlesion larger than 2 cm in dia in dermal and subcut. layers (lipoma, steatoma)
Wheal
elevated firm rounded lesion with localized skin edema that varies in size, shape color, ligher in center (hives, bites)
vesicle
elevated circumscribed fluid filled lesion less than 0.5 cm (poison ivy, chicken pox)
pustule
small, raised, circumscribed fluid filled lession contains ps; less than 1 cm (acne)
bulla
a vesicle of blister larger than 1 cm in dia (2nd degree burns0
excoriations
linear scratch marks or traumatized abrasion of the epidermis (scratches, abrasions, chemical burns)
fissures
small slit or cracklike sore that extends into the dermal layer;
Ulcer
open sore or lesion tht extends into dermis and heals with scaring
4 solid elevated lesions
papule, nodule, tumor, wheal (smallest to largest)
3 fluid-filled elevated lesions
vesicule, postule, bulla
secondary lessions (3)
excoriation, fissure, ulcer