Lecture 5 - Tissues Epithelium Bio416K Spring 2010

Lecture 5 - Tissues Epithelium Bio416K Spring 2010 -...

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Tissues of the Body (Chapter 3, pages 72-84 ) Tissue = group of cells that are similar in structure and/or perform a common or related function Four different tissue types in the body: 1. Epithelial (covering, exchange) 2. Connective (support, attachment) 3. Muscle (movement, locomotion) 4. Nervous (communication, control) 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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  • Spring '10
  • Findell
  • Epithelial¬†cells, Stratified Cuboidal Epithelium, columnar epithelium, stratified columnar epithelium, squamous stratified columnar

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Lecture 5 - Tissues Epithelium Bio416K Spring 2010 -...

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