Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Body Membranes A. Epithelial Membranes (misnomer!!)  Cover body surfaces  Line body cavities  Form protective sheets around organs  Contain epithelium and connective tissue (therefore are considered organs)

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings More to Remembrane

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Types of Epithelial Membranes 1. Cutaneous membrane = skin  Dry membrane  Outermost protective boundary Epidermis: epithelium ________________________________ Dermis: mostly dense connective tissue

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings 2. Mucous Membranes OR Mucosa (epithelial) Epithelium ______________________________________ Loose connective tissue  “Wet” membrane (goblet cells)  Lines all body cavities that open to the exterior body surface  Often adapted for absorption or secretion  Some secrete mucous (respiratory, digestive, reproductive), but not all (urinary)

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings 3. Serous Membranes Or Serosa (epithelial) epithelium ____________________________________ areolar connective tissue  Line body cavities that are closed to the exterior of the body  Serous membranes occur in pairs separated by serous fluid  Visceral layer covers the outside of the organ  Parietal layer upper most layer

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Names of Serous Membranes to know  Peritoneum  Abdominal cavity  Pleura  Around the lungs  Pericardium  Around the heart Peri- about, surround, enclose

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings B. Connective Tissue Membrane  Synovial membrane  Connective tissue only (no epithelium)  Lines fibrous capsules surrounding joints  Secretes a lubricating fluid