PowerPoint ® Lecture Slide Presentation by Patty Bostwick-Taylor, Florence-Darlington Technical College Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings PART C 3 Tissues

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Body Tissues  Tissues  Groups of cells with similar structure and function  Four primary types  Epithelial tissue (epithelium)  Connective tissue  Muscle tissue  Nervous tissue

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Epithelial Tissues  Locations  Body coverings  Body linings  Glands  Functions  Protection  Absorption  Filtration  Secretion

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Epithelium Characteristics  Have free surfaces - open to the outside or internal space  Rests on a basement membrane (non-living)  Avascular (no blood supply)  Readily divide to heal regions

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings 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 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 Simple Epithelia  Simple squamous  Function: Sites for easy diffusion  Location: Forms membranes  Body cavities  Lungs and capillaries

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Simple Squamous Epithelia Figure 3.18a

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Simple Epithelia  Simple cuboidal  Function: Secretion and absorption  Location: ovaries, kidneys and salivary glands

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Simple Cuboidal Epithelia Figure 3.18b

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Simple Epithelia  Simple columnar  Function: Movement - Can be ciliated or form microvilli  Location: Fallopian tubes and digestive tract

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Simple Columnar Epithelia Figure 3.18c

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Simple Epithelia  Pseudostratified columnar  False layers  Function: absorption or secretion  Location: Respiratory Tract

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Simple Pseudostratified Epithelia Figure 3.18d

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Stratified Epithelia  Stratified squamous  Rapidly dividing  Function: protective covering  Location: Skin, Mouth, Esophagus

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Stratified Squamous Epithelia Figure 3.18e

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Stratified Epithelia  Stratified cuboidal  Function: Secretion  Location: Larger glands - mammary, sweat, salivary and pancreas

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Stratified Epithelia  Stratified columnar  Function: Secretion  Location: Urethra

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Transitional Epithelia  Transitional epithelium  Function: Stretching and a barrier  Location: Bladder

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Transitional Epithelia Figure 3.18f

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Glandular Epithelium  Definition: Gland  One or more cells responsible for secreting a particular product

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Glandular Epithelium  Two major gland types  Endocrine gland  Function: Secretes hormones into the blood  Location: Thyroid, Pituitary  Exocrine gland  Function: Secretes mucus, sweat, oil into internal or external surfaces  Location: Pancreas, Skin