Chapter 4-Tissue Level of Organization.pdf - CHAPTER 4: THE...

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CHAPTER 4: THE TISSUE LEVEL OFORGANIZATIONHuman Anatomy and Physiology IDr. Jenny Harper
TISSUES1.Epithelial2.Connective3.Muscle4.Nervous
EMBRYONIC ORIGINS OF TISSUES1.Ectoderm2.Mesoderm3.Endoderm
TISSUE MEMBRANES1.Connective tissue membranesSynovial membrane2.Epithelial membranesMucous membranesSerous membranesCutaneous membranes
EPITHELIAL TISSUE (THE 1STTYPE OF TISSUE)Most epithelial tissues are essentially large sheets of cells covering all the surfaces ofthe body exposed to the outside world and lining the outside of organsEpithelial cells derive from all three major embryonic layersAll epithelia share important structural and functional featuresEpithelial tissues are nearly completely avascularEpithelial tissues provide the body’s first line of protection from physical, chemical,and biological wear and tear
CELL TO CELL JUNCTIONS1.Tight junctions2.Anchoring junctionsDesmosomesHemidesmosomesAdherens3.Gap junctions
CLASSIFICATION OF EPITHELIAL TISSUESShapeSquamousFlat and thinCuboidalBox-shapedColumnar

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