Ch3ppt epithelial skin

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Ch3ppt epithelial skin

  1. 1. PowerPoint® Lecture Slide Presentation by Patty Bostwick-Taylor, Florence-Darlington Technical College Cells and Tissues 3 PART C Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
  2. 2. Epithelial Tissues  Locations  Body coverings  Body linings  Glandular tissue  Functions  Protection  Absorption  Filtration  Secretion Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
  3. 3. Epithelium Characteristics  Cells fit closely together and often form sheets  The apical surface is the free surface of the tissue  The lower surface of the epithelium rests on a basement membrane  Avascular (no blood supply)  Regenerate easily if well nourished Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
  4. 4. Epithelium Characteristics Figure 3.17a Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
  5. 5. Classification of Epithelia  Number of cell layers  Simple—one layer  Stratified—more than one layer Figure 3.17a Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
  6. 6. Classification of Epithelia  Shape of cells  Squamous  flattened  Cuboidal  cube-shaped  Columnar  column-like Figure 3.17b Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
  7. 7. Stratified Epithelia  Stratified squamous  Cells at the apical surface are flattened  Found as a protective covering where friction is common  Locations  Skin  Mouth  Esophagus Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
  8. 8. Stratified Epithelia Figure 3.18e Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings

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