Histologycc - Histology Howcellsareorganizedandworktogether...

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1 Histology Histology How cells are organized and work together S. C. Williams San Francisco state university
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2 Introduction Introduction What is histology? What are tissues? How is knowledge of histology important to you? In this lesson you will learn how tissues are structured and  function We develop through the development of tissues We age and die when tissues cannot be maintained
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3 Overview Overview Tissues are the way cells are packaged to support their  functions Organs are composed of the various tissues working  together Tissues are living aggregations of cells that: Grow and develop Must be maintained and repaired May become dysfunctional, or die Are important in our aging processes
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4 How How  Tissues Tissues  Are Are  Studied Studied Why study tissues? Clinical diagnosis – e.G., Biopsy Personal management – i.E.,  Muscle performance Gives unique understanding of  anatomy, physiology, and fitness Preparation of specimens for study Killing and fixation – embedding Sectioning – mounting – staining Examination – interpretation Microscopy: light vs. Election
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5 Histological Investigations
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6 Tissue Tissue  Classification Classification Criteria: structure, matrix,  function Embryonic origin Intracellular vs.  Extracellular materials Kinds of tissues: Connective  Muscle Nervous Epithelial
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7 Epithelial Tissues Definition: Covers surfaces or may be secretory Rests on a basement membrane Minimum of extracellular substance
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8 Functions of Epithelium Protection Cover organs Secretion Lubrication Absorption Excretion Controls passage of  substances
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9 Classification of Epithelium By shape Squamous,  cuboidal,  columnar,  transitional
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10 Classification by Arrangement: Simple Stratified Pseudostratified
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11 Examples of Epithelial  Tissues
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This note was uploaded on 09/23/2011 for the course BIOL 328 taught by Professor Staff during the Spring '11 term at S.F. State.

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Histologycc - Histology Howcellsareorganizedandworktogether...

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