intergumentary system Flashcards
skin is an organ because
it consists of tissues joined together
made up of nails,hair and glands ,
largest organ of the body
intergumentary system
enable physical sensation
mechanoreceptors
what is normal healthy skin?
slightly moist soft flexible acidic free of blemishes and disease self renewing
what are the functions of the skin?
regulation of body temperature protection reception of stimuli excretion synthesis of vitamin d immunity
the outer thinner layer of the skin
epidermis
the inner thicker layer of the skin
dermis
the outer most layer of the skin
epidermis
stratum corneum
translucent layer of the skin
(epidermis)
Present in palms of hands,filled with keratin
stratum lucidium
layer is 3-5 layers thick
stratum granolosum
prickle cell layer, multiple layers of columnar cells
stratum spinosum
the deepest layer, single row columnar
stratum germinativum (basale)
cells that produce melanin
melanocytes
molecule gives its skin its color and protect from uv rays
melanin
growths of the epidermis
hair
composed of keratinized pigmented cells
hair
detect pain and temperature
sensory nerve endings
mechanoreceptors in deep layers of the epidermis
markels disks
cells active in the capture of precessing foreign substances
langehan’s cells
keratinized modifications of the epidermis,protect the digits and serve as tools
nails
cuticle overlies the proximal end of the nail.
eponychium
skin folds overlies the lateral edges of the nail
paronychium
thickened layer of the epidermis under distal part of nail
hyponychium
whitish crescent of nail
lunula
fibrous connective tissue layer of skin highly sensitive and vascular
dermis
lies just under the epidermis,cone shaped help anchor epidermis to dermis contain blood vessels and nerve endings
reticular layer
exocrine glands with ducts into hair follicles produce oily substance called sebum
sebaceous glands
exocrine glands that secrete sweat
sudoriferous glands
connected to hair follicles
axille, groin, and around the nipples
approcrine glands
more numerous than approcrine glands,they can be found in:
palms of hands, soles of feet, forehead, part of external genetelia.
eccrine glands
specialized sudoriferous glands in breast, they secrete milk
mammary glands
specialized sudoriferous glands, they secrete ear wax
ceruminous glands
are distributed to the erector pili muscles they cause goose bumps
motor nerve fibers
stimulate the glands of skin both sebaceous and sudoriferous they detect pain, heat and pressure
secretory nerve fibers
detect painful sensations
free nerve endings
heat and cold sensors
thermoreceptors
detect pressure
mechanoreceptors
markel's disks meissner's corpuscles pacinian's corpuscles ruffini's endings panniculus adiposus ARE ALL
mechanoreceptors