Lecture 4 - Tissues - Epithelium Spring 08

Lecture 4 - Tissues - Epithelium Spring 08 - Tissues of the...

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Tissues of the Body Tissue = group of cells that are similar in structure and perform a common or related function Four different tissue types in the body: 1. Epithelial 2. Connective 3. Muscle 4. Nervous Tissues are differentiated by: Specialized functional characteristics Specialized structural characteristics Amount of extracellular material present Specialized cell-to-cell contacts Simple tissues – one cell type (e.g., epithelium) Complex tissues – many cell types and extensive extracellular material (e.g., connective tissues)
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Epithelial Tissue An epithelium is a sheet of cells that covers a body surface or lines a body cavity. Epithelia are tissues that serve as protective layers, exchange and transport membranes and/or secretory components of body organs and systems. Characteristics: 1. High cellularity 2. Supported by connective tissue 3. Specialized contacts 4. Avascular 5. Regenerative 6. Polarity – apical and basal surface 7. Innervated
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This note was uploaded on 04/16/2008 for the course BIO 416K taught by Professor Findell during the Spring '08 term at University of Texas at Austin.

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Lecture 4 - Tissues - Epithelium Spring 08 - Tissues of the...

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