abdominal cavity the cavity of the body between the diaphragm above and the pelvis below, containing the abdominal organs. absorption c's cavities in developing compact bone due to osteoclastic erosion, usually occurring in the areas laid down first.
body cavity Any space in the body that does not freely communicate with the outside. Body cavities are covered with specialised lining cells—e.g., mesothelial cells in the pericardium, peritoneum and pleura. Body cavity types • Major—Pericardial, pleural, peritoneal, cerebrospinal.
Serous fluid is secreted by both membranes and acts as a lubricant, allowing organs to slide in the cavity without causing friction. Typically, the serous membranes are named according to the cavity and organ they associate with. For instance, the parietal pericardium lines the pericardial cavity.
The thoracic cavity has three compartments: the mediastinum and two pleural cavities. The mediastinum is home to the heart, trachea, great vessels, and some other structures. The pleural cavities are on either side of the mediastinum and contain the lungs and the pleural linings.