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43 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Integumentary system
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skin and associated accessory organs, glands and structures
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cause of psoriasis
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caused by cells dividing up to 7x faster than normal
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Dermatitis
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an inflammatino of the dermis
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Contact Dermititis (2)
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Allergic-Exposure to allergen e.g.-poison ivy
Irritant-exposure to irritant e.g, cosmetics, soapy H20 |
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Dermis
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fibers(resulting in thinner skin)-sebum(oil)-hair melanin follicles, nail blood supply, # nerve receptors, # lymphocytes, sweat glands, vasomanipulation ability, blood vessels, vit. D activation
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Dermis characteristics
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a.Irregular dense connective tissue(collagen,elastic fib.)
b.smooth muscle fibers(hair follicles, scrotum, facial expression) c.nerve cells-both motor+sensory) blood vessels e.glands(sweat+sebbaceous) f.Hair follicles |
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Subcutaneous characteristics
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a.Loose connective tissue
b.adipose tissue c.blood vessels d.nerves |
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Function of Hair follicles
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produce hair and release sebum(oil)
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Root of hair follicle
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portion embedded in skin
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papilla of hair follicle
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nutritive bud of connective tissue and vessels
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shaft of hair follicle
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portion of hair that exits follicle
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Arrector pilli muscle of hair follicle
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smooth muscle that stands hair up
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Cause of Alopecia(hair loss)
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result of fever, low estrogen levels, genes, meds and autoimmune disorders
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Sebaceous glands
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(oil glands)-holocrine gland that secretes sebum(fatty oil+cells). Associated w/follicle. function: reduce dessification, water proofing, preserve hair
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What causes acne?
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Excess sebum secretion results in acne due to plugged ducts.
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Sweat glands
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Ducts w/ coiled base
Function:reduction of toxins, thermoregulation, etc. |
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Eccrine (function)
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thermoregulation, waste elimination
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sweat gland
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apocrine (function)
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wetting of skin and scent production, especially during times of excitement.Open into follicles
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sweat gland
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Ceruminous (function)
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produce ear wax
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sweat gland
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mammary (funtion)
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produce milk
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sweat gland
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salivary (funtion)
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produce saliva for digestion
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sweat gland
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Nails (funtion)
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Defense, grip
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sweat gland
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Hypothermia
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below normal body temp.
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thermoregulation by the skin
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Hyperthermia
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Abovenormal body temp.
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thermoregulation by the skin
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Teperature reduces through:(5)
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a.radiation
b.conduction c.convection d.evaporation e.vasolidation |
thermoregulation by the skin
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Genes
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# of melanocytes equal between races. color functions amount of melanin produced and size of granules
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Fators affecting skin coloration
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color depends on what?
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activity of melanocytes
*dark skin=large granules *light skin=small granules in clusters of 2-4 |
factors affecting skin coloration
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Enviromental
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UV exposure ups increases melanin production
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factors affecting skin coloration
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physiology
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e.g.increase of O2, increases redness;decrease of 02 increases blueness;excitement increases redness; increase of bilirubin increases yellowness(jaundice),aging, sun exposure, pregnancy mask
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factors affecting skin coloration
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Temperature increases through: (4)
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a.vasoconstriction
b.shivering c.conduction d.convection |
thermoregulation by the skin
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Skin Repair
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Damage occurs-clot formed-fibroblasts secrete collagen fibers to bind margins-growth factors released to stimulate mitosis-phagocytes remove debris-regenerating cells push off scab
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how a cut heals
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does chance of scarring formation increase or decrease when size of wound increases?
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increases
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forms more collagen fiber
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first degree
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-reddened, edema, + possible peeling of epidermis
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Burns
(superficial partial thickness) |
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second degree
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capillary drainage and blister formation and peelin affects epidermis and dermis.
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Burns
(deep partial thickness) |
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third degree
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destruction of epidermis, dermis, and associated organs and subcutaneous.
(flame=carbonization of skin) |
Burns
(full thickness) |
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Diet
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from eating plants containing carotene pigment
(ex.pumpkins, carrots...) |
factors affecting skin coloration
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epidermis
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maintains thickness, mitosis decreases, cells larger + irregular in shape, keratin changes shape relulting in scaly skin, "age/liver spots" appear
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Aging of Skin
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Dermis
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decrease of: fibers(resulting in thinner skin), sebum, hair melanin, follicles, nail blood supply, # nerve receptors, # lymphocytes, sweat glands, vasomanipulation ability, blood vessesls, vit. D activation
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Aging of the Skin
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Subcutaneous
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decrease fat, dec. fibers and fat cause sagging skin and wrinkles
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Aging of the Skin
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Serous
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line cavities that do not open to ouside, cover organs
f: reduce friction via serous fluid prod. |
epithelial membranes
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Mucous
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line cavities that do open to ouside
f:prevent dessification, reduce friction, trap debris w/mucous via goblet cells |
epithelial membranes
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Cutaneous(skin)
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Interphase between body and external enviroment
f:prevent dsseification, reduce abrasion, resist infection, sense enviroment, vit. activation, waste elimination. |
epithelial membranes
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epidermis: (4) characteristics
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a.lack vasculinization
b.increase in # of desmosomes c.keratinized(cornified) @ surface d.melanocytes-f:production of melanin to decrease UV damage |
Components of Cutaneous membrane(skin)
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