1. PERITONEUM and COELOM

2. Peritoneum Coelom: Examples: Def. – a body cavity lined with mesoderm.
Pericardial cavity.
Pleural cavities.
Abdominopelvic cavity.

3. Peritoneum Mesodermal membranes associated with a true coelom:
Serous membranes.
Parietal membrane:
Lines the walls of the coelom.
Visceral membrane:
Covers the viscera within the coelom.

5. Peritoneum Mesenteries:
Double membranes connecting the parietal and the visceral peritoneum.
In some instances mesenteries are referred to as ligaments.

7. Mesenteries Functions: Support viscera.
Provide pathway for blood vessels and nerves to reach viscera.

8. Peritoneum Parietal peritoneum. Visceral peritoneum. Retroperitoneal:
Refers to structures that lie behind the peritoneum:
i.e., kidney.
Usually covered on one surface by peritoneum.