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3 main function of body membranes
- -line or cover body surfaces
- -protect
- -lubricate
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2 main types of body membranes
- -epithelial
- -connetive tissue
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cutaneous membrane is
skin
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cutaneous membrane is the most
dense connective tissue and outmost protective boundary
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what membrane is only in connective tissue
synovial
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outermost layer of skin
epidermis
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fat, anchors skin to organs
hypodermis
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covering around hair root
hair follicle
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duct is open to skin
eccrine sweat gland
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sweat exits skin
sweat pore
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ridges in dermis
dermal papillae
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touch receptors
meissner's corpuscle
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varies nerve in skin
free nerve ending
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dermis; connective tissue
reticular layer
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empty oil into hair
sebaceous gland
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causes hair to stand up
arrector pili
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nerves in skin
sensory nerve fiber
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senses virbrations to touch
pacinian corpuscle
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sense the postiion of hair
hair follicle receptor
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sebaceous glands produce -
oil, which libriates skin and kills bacteria
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2 types of sweat glands;
- -eccrine - open to pore on skin surface
- -apocrine - ducts empty into hair follicles
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composition of sweat glands;
- -mostly water
- -some metabolic weaste
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functions of sweat glands;
- -helps disspiate excess heat
- -excretes waste products
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compare 3 diff types of epitheial membranes
- -cutaneous (skin and interacts with external environment)
- -mucous -lines throat, nose, & are internal and contact external environment
- -serous (surround heart, lungs, abs, and only contact internal environment
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4 main functions of skin;
-protects our body from 1. dessication, 2. heat regulation, 3. bacterial damage and 4 mechanical damage
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what is melanin
component that gives our skin color
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where is melanin found
in epidermis
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2 types of skin cancer
- -benign-doesnt spread
- -malignant -moves to other parts
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basal cell carcinoma (skin cancer that is
- -least malignant
- -most common type
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most deadly of skin cancer:
malignant melanoma
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the ABCD rule is:
- a-asymmentry
- b-border irregularity
- c-color
- d-diameter
- e-elevation above skin
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