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HISTOLOGY

HISTOLOGY. Four Basic Types of Tissue Epithelial Connective Muscle Nerve. Thanks to Pam Brannock (USC Biology,Hilbish Lab) for creating this PowerPoint. EPITHELIAL TISSUE. Cells are bound tightly together Little extracellular material Arranged in sheets

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HISTOLOGY

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  1. HISTOLOGY • Four Basic Types of Tissue • Epithelial • Connective • Muscle • Nerve Thanks to Pam Brannock (USC Biology,Hilbish Lab) for creating this PowerPoint

  2. EPITHELIAL TISSUE • Cells are bound tightly together • Little extracellular material • Arranged in sheets • Cover internal and external surfaces • Often control passage of material • Classified by shape of cells and number of layers

  3. EPITHELIAL TISSUE CELL SHAPE • Squamous shape • Thin, flat cells • Look like fried eggs • Cubodial shape • square shape- cross section • 6sided polygon- surface • Columnar • Rectangular- cross section • Polygonal- surface view CELL NUMBER • Simple • Single layer • Stratified • 2+ layers • Pseudostratified • Appear stratified- but not • Transitional • Change shape

  4. EPITHELIAL TISSUE SIMPLE SQUAMOUS • Single layer • Squamous shape • Lining of body cavity, lungs, blood vessels

  5. EPITHELIAL TISSUE SIMPLE CUBOIDAL • Single layer • Cuboidal shaped • Kidney tubules, glands

  6. EPITHELIAL TISSUE SIMPLE COLUMNAR • Single layer • Columnar shape • Lining of digestive tract • Modified by presence of cilia

  7. EPITHELIAL TISSUE STRATIFIED SQUAMOUS • Multi layer • Outer most layer- squamous cells • Inner- cuboidal or columnar • Lining of mouth, esophagus, skin

  8. EPITHELIAL TISSUE PSEUDOSTRATIFIED COLUMNAR • One layer • Appears stratified • Respiratory tract

  9. CONNECTIVE TISSUE • Abundant extracellular material • Matix (dominant part) • Fiber, cells in liquid, gel, or solid matrix • Function • Bind and/or support other tissue

  10. CONNECTIVE TISSUE CONNECTIVE TISSUE PROPER • Matrix consist of fibers • Loose or areola • Few fibers • Delicate arrangement • Fibrous • Ex. Tendons • Abundant, well organized fiber

  11. CONNECTIVE TISSUE ADIPOSE TISSUE • Loose connective • Store large droplets of fat BLOOD • Lymph • Liquid matrix • Sometimes in different category • RBC- Red Blood Cells • WBC- White Blood Cells

  12. CONNECTIVE TISSUE CARTILAGE • Chondrocytes • Small cavities- lacunae • Rubbery consistency (matrix) • Ear, nose

  13. CONNECTIVE TISSUE BONE • Osteocytes • Small cavities- lacunae • Hardest CT • Impregnated w/ calcium salts • Spongy • Loose rods of bones • Ends of arms and legs • Compact • Shafts of long bones • Tightly organized

  14. MUSCLE TISSUE • Cells have ability to contract • Function • Locomotion • Other body movement

  15. MUSCLE TISSUE SKELETAL • Voluntary movement • Long and cylindrical • Transverse striation • Each fiber is multi-nuclear

  16. MUSCLE TISSUE SMOOTH • Involuntary movement • Predominant • Long, spindle shape • Single nucleus • Internal organs

  17. MUSCLE TISSUE CARDIAC • Striations • Involuntary • One nucleus • Deep center • Heart muscle

  18. NERVE TISSUE • Cells very high ability to • Respond to stimuli • Transmit impulses

  19. NERVE TISSUE NEURON • Cell Body(3) • Dendrites (5) • Axon(1)

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