Other Serous Cavities Of The Body

a. Other important serous cavities are associated with the major hollow organs, referred to as visceral organs. Each lung is encased in a serous cavity called the pleural cavity. The heart lies in a serous cavity called the pericardial cavity. The intestines are allowed to move freely during the digestive processes within the peritoneal cavity.

Figure 3-3. A bursa--the simplest serous cavity.

b. Each serous cavity has an inner and an outer membrane. The inner membrane is intimately associated with the surface of the visceral organ. The outer membrane forms the outer wall of the cavity. The serous lining of the cavity secretes the serous fluid into the cavity to act as a lubricant between the membranes, allowing freer motion for the organs.

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