Unit 7 Tissue Level of Organization.pptx - HTHS 1110...

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The Tissue Level ofOrganizationHTHS 1110Integrated Human Anatomy &Physiology IUnit 7
Features of Body TissuesTissues are made of agroup of cells that share acommon functionGroups of tissues make upan organWe will be studying 4important groups of tissue:epithelial, connective,muscle and nervousHistology is the study oftissuesObjective 1
The Four Tissue Types1.Epithelial tissueForms coverings protecting the body from the outside worldForms bordersLines hollow organs and forms glands2.Connective tissueProtects and holds the structure of body3.Muscular tissueMoves body parts4.Nervous tissueSensation, information processing, and control of body partsObjective 1
Tissue Type #1Epithelial TissueObjective 2-3
Features of Epithelial TissuesForms barriersInnervated but avascularEpithelial cells have 2 surfacesApical surface:faces outsideworldBasal surface:attaches tobasement membraneBasement membrane has 2 surfacesBasal lamina next to the cellsReticular lamina next to connectivetissueConnective tissue deep toepithelium provides nutrientsand oxygen through bloodObjective 2
Classification of EpitheliaObjective 2arrangementsimplepseudostratifiedstratifiedshapesquamouscuboidalcolumnarArrangement oflayersCell ShapeOne layer.All cellsin contact withbasementmembraneAll cells incontact withbasementmembrane butappears to havelayers.Two or more layers.Only basal layer incontact withbasementmembrane.Flat, wide “pavingstone” cellsCells as tall as theyare wideCells taller than theyare wide
Naming EpitheliaArrangement + ShapeThree arrangements x three shapes = nine combinationsTwo of these are not used, but add transitional; cells thatchange shape = eight combinationsIf different shapes present, always named by shape ofcells in apical (outermost) layersimple squamouspseudostratified squamousstratified squamoussimple cuboidalpseudostratified cuboidalstratified cuboidalsimple columnarPseudostratified columnarstratified columnartransitionalObjective 2
Simple Squamous EpitheliaSingle layer of thin, flatcellsDiffusion or filtrationLocations:Lining of heart and bloodvesselsAlveoli (air sacs) of lungsKidney filtrationObjective 3simple squamouspseudostratifiedsquamousstratified squamoussimple cuboidalpseudostratifiedcuboidalstratified cuboidalsimple columnarPseudostratifiedcolumnarstratified columnar
Simple Cuboidal EpitheliaObjective 3Single layer of cube-shapedcellsSecretion or absorptionLocationsKidney tubulesExocrine glandssimple squamouspseudostratifiedsquamousstratified squamoussimple cuboidalpseudostratifiedcuboidalstratified cuboidalsimple columnarPseudostratifiedcolumnarstratified columnar
Simple Columnar EpitheliaSingle layer of column-likecellsWith or without ciliaWith or without microvilliWith or without mucus(goblet cells)Objective 3simplesquamouspseudostratifiedsquamousstratifiedsquamous

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Term
Spring
Professor
BradT.Marden
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