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Chapter 5 Tissues.pptx - CHAPTER 5: TISSUES ALEXIS ROBERTS,...

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CHAPTER 5:TISSUESALEXIS ROBERTS, BACHELORS OF ANIMAL & VETERINARYSCIENCES
4 MAJOR TISSUE TYPES1. Epithelial tissues2. Connective Tissues3. Muscle Tissues4. Nervous Tissues
FUNCTIONS OF EPITHELIAL TISSUESCover and lines other tissuesSecretes and excretes biochemical substancesAbsorbs nutrientsProvides sensory inputsManfactures secretions and excretions
MAJOR TYPES OF CELLULAR JUNCTIONS INEPITHELIAL CELLS1. Tight Junction-formed by fusion of outermost layers ofplasma membrane of adjoining cells2. Desmosome- welded plaque/ thickening that connectsplasma membranes of adjacent cells3.Gap junctions-cells are linked by tubular channel proteins( connexons) cytoplasm to cytoplasm
BASEMENT MEMBRANESNon living meshwork of fibers. Hasstrength and elasticity. It has varyingdegrees of thickness also like a partialbarrier.
CHARACTERISTICS USED TO CLASSIFYDIFFERENT EPITHELIAL TISSUES1. # of layers of cellSingle layer: simple epitheliaMore than one layer: stratified

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Collagen

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