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21 Cards in this Set
- Front
- Back
Function of body membranes
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line surfaces, lubircate, protect
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types of epithelial membranes
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cutaneous, mucous, serous
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cutaneous membrane (skin)
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Tissue: keratinizing stratified squamous epithelium; underyling dermis: dense connective tissue
functions: protect-- s.s. epithellium makes skin tough |
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mucous membrane
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epithelium lying on a lamina propia: loose tissue membrane
functions: lines all body cavities open to the exterior examples: hollow organs of the respiratory, digestive, urinary, and reproductive tracts |
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serous membrane
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tissue: simple squamous epithelium on top of a layer of areolar tissue separated by fluid
--inner layer is attached to the organ (visceral), outer layer is attached to the body cavity (periodal). function: lines body caveties closed to the exterior examples: peritoneum-- lines abdominal caveites covering organs pleura: lines the lungs pericardium: lines the heart |
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connective tissue membranes
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synovial membrane
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synovial membrane
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only type of connective tissue not considered an organ
tissue: soft areolar tissue function: line capsules surrounding joints examples: joints |
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Basic skin functions
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--insulates and cushions body organs
--prtects the body from damage and bacteria --prevents water loss --regulates heat loss --manufactures proteins --holds nerve receptors |
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skin is composed of two types of tissue:
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epidermis: stratified squamous epithelium and the dermis: dense connective tissue
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layers of the epidermis are called:
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strata
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strata:
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stratum basale
spinosum granulosum lucidum corneum |
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stratum basale:
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bottom layer, site of active cell regeneraion
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stratum corneum:
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dead keratinized cells
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keratinocytes
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cells of the epidermis that produce keratin
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pigent that gives skin color
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melanin-- produced by melanocytes-- found in the stratum basale
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the pigment is important becuase
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it sheilds DNA from ultraviolent rays
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dermis:
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vascularized lower region of the epithelium
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the dermis consists of two regions:
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papillary and reticular
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papillary layer:
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consists of fingerlike projections called dermal papillae(responsible for fingerprints)
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reticular layer
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deepest layer; contains blood vessels, sweat and oil galnds, and deep pressure receptors
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hypodermis
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layer of adipose tissue found under the skin that anchers it to organs
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