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ch. 5 integumentary system

epidermis is made of up this kind of tissue epithelial
dermis' made up of these tissue types connective, nerve & muscle
__ makes up 90% of cells in the epidermis kerantinocytes
provide melanin pigment Menanocytes
cells that come from bone marrow langerhan cells
theses cells provide immunity langerhan cells
these cells form touch receptors merkel cells
merkel cells lay in the ___ section of the epidermis deepest layer
___ layer contains dark staining keratohyalin granules stratum granulosum
deepest single layer of cells stratum basale
also called stratum germinativum stratum basale
combination of merkel cells, melanocytes, keratinocytes & stem cells that repediately divide stratum basale
in the stratum basale layer of the epidermis cells attach to each other & to basement membrany by _______ desmosomes & hemidesmosomes
8-10 cell layers held together by desmosomes stratum spinosum
in this layer melanin taken in by phagocytosis from nearby melanocyes stratum spinosum
3-5 layers of flat dying cells showing nuculear deneration stratum granulosum
this layer contains lamellar granules that release lipids that repels water stratum granulosum
this layer is only seen in thick skin stratum lucidum
3-5 layers of flat dead cells contains precusor to keratin stratum lucidum
25-50 layers flat dead cells filled w/ keratin and surrounded by lipids stratum corneum
layer of epidermis that friction stumulates callus formation stratum corneum
stem cells divide to produce ___ keratinocytes
Af keratinocytes are pushed up towards the surface, they fill with ___ keratin
It takes __ weeks for a cell to travel through all the layers 4
This hormone can speed up the cells journey through the epidermis epidermial growth factor (efg)
These compose the dermis collagen, elastic fibers, fibroblasts, macrophages & fat cells
this layer contains hair follicles, glands, nerves & blood vessels dermis
two major regions of dermis papillary & reticular regions
anchor epidermis to dermis, contain capillaries that feed epidermis& contains meissner's corpuscles are functions of the __ region papillary region
the papillary region contains ___ &makes up the __ of the dermis dermal papillae (finger like projections) to 20%
the recticular region is made up of this type of tissue connective
This region is packed with oil glands, sweat glands ducts & hair follicles recticular region
this region provides strength extensibility and elasticity to skin (strech marks) recticular region
epidermal ridges form in fetus as epidermis conforms to dermal papillae (increasese gripi of hands)which region does this occur in? recticular
melanocytes convert ___ to melanin tyrosine
inherited lack of tyrosinase albinism
autoimmune loss of melanocytes in areas of the skin (white patches) vitiligo
This precursor to vitamin A is found in stratum corneum & dermis carotene
red oxygen carrying pigment in bloodcells hemoglobin
yellowish color to skin and whites of eyes buildup of bilirubin in blood from liver disearse jaundice
bluish color in nail bds aand skin hemoblobin depleted of oxygen looks purple blue cyanotic
redness of skin due to enlargement of capillaries in dermis during inflammation & infection it burn erythema
cells sink inwards during development to form: hair, oil glands, sweat glands (sudoriferous, & nails
core of the hair medulla
daughter cells farther from the center of the hair matrix for the _____ (intermed layer) cortex
surface of hair cuticle
CS round in straigh hair oval in curly no answer
this surounds the hair root and the deeper portion of the shaft. produced by cells at the periphery of hair mtris internal root sheath
extends from skin surface to hair matrix cell layers foun in the superficial epidermis external root sheath
thickened basal lamina wrapped in dense connective tissue sheath glassy membrane
base of hair follicle is ___ (germindal cell layer) hair bulb (surrounds hair papillia)
these detect hair movement hair root plexus
smooth muscle in dermis contracts with cold/fear gOoOooOosebumps form as hairs pulled virtically arrector pili
in the growth stage the matrix cells at the base of hair root produce ____ length of hair
The resting stage of hair last for ___ and folicle atrophies 3 months
blonde & red hair contain melanin with ____ iron and sulfer
oil glands: secretory portion in the dermis, most open onto hair shafts sebaceous gland
this keeps hair soft, is composed of cholestoerol, proteins fats & salts, and inhibits growth of bacteria sebum
sudoriferous glans that are in most areas of the skin, secrete portion in dermis w/ duct to serfact, regulatebod temp eccrine glands
found in the armpit and pubic region, secretes entire cell to cause lager oder, apocrine glands
these glands produce waxy secretion in ear canal ceruminous glands
nails are composed of tightly packed _____cells keratinized
the lunula appears white due to thickedned ____ stratum basale
cuticle (eponychium) is made up of this stratum corneum
visible portion of nail pink due to ___ underlying capillaries
another name for cuticle eponychium
nails grow this fast 1mm/week
thick skin lacks this hair folicles & sebaceous glands
in which layer of the skin does cell division occur? stratum germinativum
which layer consists of loose connective tissue & contains capiliaries & sensory neurons papillary region
this region consists of dense irregular connective tissue and bundles of colagen fibers recticular region
pressure sores decubitus ulcers
eoudernus develops from this germ layer ectodermal
dermis develops from this gem layer mesodermal
fetal hair lanugo
slipper coating of oil and slothed skin present at birth vernix caseosa
non-life threatening skin cancer basal cell carcinoma & squamous c ell carcinoma
Created by: snuffleupagus



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