Epithelial System Flashcards
Epidermis
the most superficial layer of the skin
Dermis
middle layer of the skin
Hypodermis
deepest layer of the skin
Arrector Pili
smooth muscle that connects hair follicles and creates goosebumps
Sebaceous gland
a gland in the dermis or subcutaneous layer that produces oil
Functions of Sebum
keeps skin soft, pliable, and waterproof
Merocrine glads
coiled glands in the dermis that release sweat that is saltwater and functions to cool the body
aprocrine glands
sweat glands in the pubic and underarm layers that produce thicker sweat; produces odor when come in contact with bacteria on the skin
tactile receptors
provide sensations of touch pressure and vibration
nail
outgrowth of the skin, composed of keratin
Cuticle
living skin at the base of the natural nail palate that covers the matrix area
nailbed
skin that is below the overhang of the nail
melanin
one factor that determines skin color. a brownish black pigment found in the skin, retina, and hair
hypothermia
low body temperature- cam be caused by burns because the skin helps the body regulate temperature
4 functions of the skin
protection, regulation, sensation, and excretion
hair
situated in an epidermal tube known as a follicle sunken into the dermis
keratin
protein that makes up hair and nails
melanocytes
cells that produce melanin
what does melanin look like
blackish brownish chemical
what does it mean when we say the integument is the body’s first line of defense
it protects from chemical damage, microbial damage, and mechanical damage
acne
result of over productive sebaceous glands
melanoma
cancer developed from melanocytes
basal cell carcinoma
cancer starts in the lower layer of the epidermis
squamous cell carcinoma
cancer starts in the flat cells of the epidermis, the outer layer of the epidermis
adipose
make up the hypodermis
eumelanin
determines if you have dark or light hair
male pattern baldness
genetic reaction to testosterone that produces thinner, finer hair
alopecia
autoimmune disease that results in loss of hair
first degree
burn where only the epidermis is damaged
2nd degree
burn that causes blisters and possible inflammation and pain; damages the dermis and epidermis
3rd degree
damages all 3 layers of the skin
cyanosis
bluish discoloration of the skin caused by lack of circulation or oxygen in the blood
jaundice
yellow discoloration of skin and whites of eyes caused by bile buildup
stratum lucidum
layer of the epidermis that is only present in thick skin; fingers, palms, soles
freckles
clusters of melanocytes
rickets
vitamin d deficiency that causes breakdown of bones in children
harlequin ichthyologist
sever genetic disorder that mainly affects the skin. Hard thick skin covers most of the body
Epidermolysis bullosa
genetic skin disease causing blistering by friction resulting in large open sores and extreme skin fragility.