HP_C4PPT_The Tissue Level of Organization (1) (1) (2) (2)(1).pptx

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COLLEGE PHYSICSChapter # Chapter TitlePowerPoint Image SlideshowANATOMY & PHYSIOLOGYChapter 4THE TISSUE LEVEL OF ORGANIZATION
Micrograph of Cervical TissueThis figure is a view of the regular architecture of normal tissue contrasted with theirregular arrangement of cancerous cellsTissue– group of cells working together to perform a particular functionFIGURE 4.1 (CREDIT: “HAYMANJ”/WIKIMEDIA COMMONS)
Four Types of TissueEpithelialConnectiveMuscleNervousFIGURE 4.2CLOCKWISE FROM NERVOUS TISSUE, LM × 872, LM × 282, LM × 460, LM × 800.(MICROGRAPHS PROVIDED BY THE REGENTS OF UNIVERSITY OF MICHIGAN MEDICAL SCHOOL © 2012)
EPITHELIAL TISSUEFunctionProtects surface of the bodyLines hollow organsManufactures and secretes substances (endocrine and exocrineglands)StructureCells closely connected with EM betweenExtracellular matrix (EM) – material synthesized and secreted bycells; composition varies depending on tissueBasement membrane (basal lamina) – acellular layer of EM thatlies beneath an epithelium, holding epithelial cells to underlyingcell layer
Cells of Epithelial TissueSimpleepithelial tissue -single layer of cellsStratifiedepithelial tissue -several layers of cells.
Simple, squamous epithelium – easy exchangeAlveolar sacs of lungsLining of blood vesselsEndothelium – simple squamous epithelium that lines bloodvessels where exchange between blood and tissues occurs
Epithelia Tissue Specialized for TransportSimple columnar epitheliumLumen of GI tractSimple cuboidal epitheliumLine pancreatic ductsLine kidney nephronsSimple Cuboidal Epithelium - Pancreatic Ducts from
Columnar Epithelial Cells with Goblet CellsLining of the small intestine, columnar epithelium cellsare interspersed with goblet cellsThe arrows in this micrograph point to the mucous-secreting goblet cells.FIGURE 4.7LM × 1600. (MICROGRAPH PROVIDED BY THE REGENTS OF UNIVERSITY OF MICHIGAN MEDICAL SCHOOL © 2012)
Pseudostratified ciliated columnar epitheliumCilia in respiratory tract move foreign particles up and out –mucociliatory escalatorBronchus –Dusti Sloan
Stratified Epithelial Tissue – protective due to many layersSurface of body and inside openings of body cavitiesStratified squamous epithelium found in mouth linings, pharynx, esophagus, urethra, opening of ears,anus, and vaginaSkin – stratified squamous keratinized – protective epithelia, keratin makes cells water resistantEsophagus –Dusti Sloan
Transitional epitheliumFound in the bladderBladder.DustiSloan. 400X
Summary of EpithelialTissue Cells

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