Body Membranes Cover body surfaces Line body cavities

Body Membranes § Cover body surfaces § Line body cavities § Form protective sheets around organs § Contain epithelium and connective tissue Copyright © 2009 Pearson Education, Inc. , publishing as Benjamin Cummings

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

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