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21 Cards in this Set
- Front
- Back
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tissue
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group of specialized cells w/ similar structure, perform common functions
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4 major types of tissues
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epithelial, connective, muscle, and nervous
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epithelial tissue
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sheets of cells that line or cover surfaces and body cavities. ex: inner surface of digestive tract, lungs, bladder, blood vessels.
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glands
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epithelial tissues specialized to synthesize and secrete a product
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exocrine glands
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(outside or outward) secrete products into hollow organ or duct, ex: sweat glands in skin
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endocrine glands
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secrete hormones into bloodstream, ex: thyroid gland
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squamous epithelium
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(squashed, platelike) one or more layers of flattened cells, ex: outer surface of skin
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cuboidal epithelium
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cube-shaped cells, ex: forms kidney tubules
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columnar epithelium
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tall, rectangular (column shaped) cells, ex: lines parts of digestive tract
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goblet cells
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secrete mucus
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simple epithelium
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single layer of cells. so thin, molecules can pass thru it easily
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stratified epithelium
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multiple layers of cells. thicker and protects underlying cells
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basement membrane
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supporting noncellular layer directly beneath cells of an epithelial tissue. re: mortar that anchors cells to stronger connective tissue underneath
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cell junctions
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made up of various proteins and hold cells together. three types
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tight junctions
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seal plasma membrane of adjacent cells tightly together, don't let anything pass thru cells. ex: cells that line digestive tract
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adhesion junctions
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looser in structure, allow for some movement b/w cells so tissues can stretch and bend. ex: in the epithelium of skin
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gap junctions
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connecting channels made of proteins, allow movement of ions or water b/w two adjacent cells. ex: epithelial cells in heart
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connective tissue
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supports softer organs of body against gravity and connects parts of body together, stores fat, produces cells of blood.
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matrix
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structure (nonliving extracellular material) of connective tissue
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fibrous connective tissue
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connect body parts, provide strength, support, and flexibility, consist of several types of fibers and cells
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