chp 3 - Chapter 3 Tissues Click to edit Master subtitle...

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Click to edit Master subtitle style Chapter 3 Tissues
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Tissues ¢ Group of similar cells l Same embryonic origin l have function ¢ May also include fibers, fluids ¢ Study of tissues = histology
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Tissues in medicine ¢ biopsy –tissue sample taken for examination ¢ Pathology– study of diseases in tissues ¢ Tissue Engineering– production of tissues in lab (skin, cartilage)
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4 Tissue types ¢ Epithelial ¢ Connective ¢ Muscle ¢ Nervous
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4 Tissue types ¢ Epithelial ¢ Connective l Except bone and blood ¢ Muscle ¢ Nervous
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Togetherness ¢ Cells in most tissues connected l Sealed l Attached l Via channels ¢ Exceptions: l Connective tissue cells l some nerve/muscle cells ¢ Connected cells
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Cell Junctions ¢ Where two cells’ membranes make contact ¢ Junctions that “seal” cells together l Tight Junctions ¢ Junctions that attach neighbors l Adherens l Desmosomes l Hemidesmosomes ¢ Junctions that create channels l Gap Junctions
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Fig. 2.19
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Tight junctions ¢ Waterproof seal ¢ Formed by proteins Fig. 2.19b
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hemidesmosomes, desmosomes, adherens ¢ Inside cell – plaque attached to membrane ¢ Proteins from plaque & membrane ± into EC space b attach to proteins of neighboring cell or basement membrane Fig. 2.19d
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hemidesmosomes, desmosomes, adherens ¢ Inside cell – plaque attached to membrane ¢ Proteins from plaque & membrane ± into space & attach to proteins of neighboring cell or basement membrane Fig. 2.19e
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desmosomes, adherens ¢ Integrin Cadherin Belt Cell – base. mem. Spot
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This note was uploaded on 05/28/2011 for the course BIO 331 taught by Professor Dr.burns during the Spring '10 term at N. Colorado.

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chp 3 - Chapter 3 Tissues Click to edit Master subtitle...

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