EPITHELIAL TISSUE (EPITHELIUM). Epithelial tissue (Epithelium) Lining, covering and glandular...
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Transcript of EPITHELIAL TISSUE (EPITHELIUM). Epithelial tissue (Epithelium) Lining, covering and glandular...
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EPITHELIAL TISSUE (EPITHELIUM)
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Epithelial tissue (Epithelium) Lining, covering and glandular tissue of
the body
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Epithelial tissue (Epithelium) Examples:
Skin protects against bacteria/chemicals Lining of the respiratory tract-cilia to sweep
mucus Kidney-epithelium absorbs and filters Secretion-glands
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Epithelial tissue (Epithelium)
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Forms membranes for filtration/exchange
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Glands/Ducts Salivary Glands Ducts in
Pancreas
Kidney tubules Surface of
ovaries
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Line digestive tract
Goblet cells: produce mucus
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Some cells are shorter than others
Absorption and secretion
Ciliated variety lines the respiratory tract
Goblet cells make mucus
Cilia move mucus
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Pseudostratified (ciliated) columnar
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Several layers of cells
Can stand friction: Esophagus Mouth skin
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Cells at base are cuboidal or columnar, free surface varies
Tissue can stretch
Lines the: Urinary bladder Ureters Part of urethra
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Extracellular matrix Produced by connective tissue cells Secreted to exterior
Ground substance, proteins and large polysaccharides
Matrix fibers
Gel like, to firm, to rock hard
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Extracellular matrix
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Extracellular matrix
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Types of Connective Tissue Bone Cartilage Dense Connective Tissue Loose Connective Tissue Blood