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a&p ch3 - tissues
| Question | Answer |
|---|---|
| tissue | group of cells working together to perform specialized functional and structural roles |
| types of tissues | muscular, nervous, connective, epithelial |
| epithelial tissues | widespread throughout body, covers surfaces inside and out, always has a free surface to outer environment, major tissue type of our glands, anchored down by basement membrane |
| epithelial tissues cont. | lack blood vessels, reproduce rapidly, tightly packed, protect/secrete/absorb/excrete/sensory perception |
| simple squamous | single layered thin and flattened FUNCTION: diffusion, filtration, and osmosis occur LOCATIONS: air sacs of lungs, capillary walls, blood vessels, lining of the heart and ventral body cavity |
| simple cuboidal epithelium | single layered cube shaped FUNCTION: secretion and absorption LOCATION: covers ovaries, lines kidney tubules and ducts of glands |
| simple columnar epithelium | elongated single layered FUNCTION: secretion of digestive fluids, absorption of nutrients LOCATION: lining of uterus and digestive tract organs |
| pseudostratified columnar epithelium | appear to be layered but aren't FUNCTION: secretion of mucus, propulsion of materials LOCATION: lining of the respiratory organs and tubes of the reproductive system |
| stratified squamous epithelium | many layers of squamous cells, very thick FUNCTION: protection of underlying tissues LOCATION: skin, linings of mouth and throat |
| transitional epithelium | specialized stratified layers of cuboidal and columnar cells FUNCTION: contract and relax with volume and tension changes in tissue LOCATION: urinary bladder and passageways of the urinary system |