Term
| simple squamos epithelium |
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Definition
broad and flat squamos cell with broad and thing nucleus.
rapid diffusion or transport of substances or secretion of lubrication fluid.
lung's air sacs (alveoli), and lining of heart and blood vessels (endolithium) |
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Term
| simple cubodial epithelium |
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Definition
one layer of "cube shaped" cells with centrally located nucleus.
absorbtion and secretion of fluids, and production and movement of mucus.
renal tubules, ducts and glands, bronchioles. |
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Term
| simple columnar epithelium |
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Definition
one layer of tall, narrow cells with an ovoid nuclues located at the base. and occassionally goblet cells.
absorbtion of nutrients and secretion of mucus.
stomach and intestines, uterus and fallopian tubes. |
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Term
| pseudostratified columnar epithelium |
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Definition
one layer of talls cells that appear layered but are actually not. often with goblet cells and often ciliated at free surface.
secretes and propels mucus.
trachea and bronchi. |
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Term
| stratified squamos epithelium |
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Definition
several keratanized or non-kertinized layers of cells.
protects deeper tissues from abrasions, dehydration, or penetration.
keratinized-surface of skin
non-keratinized-mouth, tongue, esophagus, anus, and vagina. |
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Term
| stratified cuboidal epithelium |
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Definition
two or more layers of "cube shaped" cells with centrally located nuclei.
helps sweat excretion, ovary hormone secretion, and sperm production.
sweat gland ducts, ovary foliciles, and semiferous tubes of testes. |
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Term
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Definition
stratified squamos epi, some cells roundish with 2 nuclei.
handles changes in tension and acts as a barrier to diffusion.
urinary tract and umbilical cord. |
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Term
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Definition
| specialzied epithelia for excretion or secretion |
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Term
| endocrine (ductless) glands |
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Definition
| secrete hormones directly into blood to change metabolism |
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Term
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Definition
| excrete substances into ducts for extra-cellular metabolic effects. |
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Term
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Definition
cancers arising from epithelial tissues
usually originiate in epithelium that contact external environment. most common cancers are: skin, lung, and colon.
80-85% of all human cancers are these. |
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Term
| striated (voluntary) muscle |
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Definition
long, cylindrical, multi-nucleated, banded cells.
contract or relax to yield conscious movements of head and face, trunk and apendages.
muscles attach to bones. |
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Term
| smooth (involuntary) muscle |
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Definition
fusiform, uninucleated, non-striated muscles.
reflexively contract for visceral movement.
visceral organ walls. |
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Term
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Definition
branching,striated, uninucleated cells joined by intercalated discs. autonomically contracts and relaxes to propel blood through heart.
heart walls only! |
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Term
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Definition
fibroblasts. fewer protein fibers, mostly colagen and less elastin and many blood vessels.
provide epithelium with nutrition, waste removal, and immunity.
in most body tissues. |
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Term
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Definition
mostly adipocytes (mostly fat vacuoles and one nucleus) with little matrix.
energy storage, thermal insulation, protective cushions, and body contour.
beneath dermis, mesentaries, kidneys, eyes, etc. |
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Term
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Definition
mostly collagen with little elastin and a few fibroblasts.
provides great tensile strength while binding parts together.
irregular: dermis and cartlidge, bones, etc.
regular: tendon and ligament
yellow elastic tissue: vocal cords
heals slowly because of few blood vessels. |
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