Multiple Choice
Which body cavity has multiple serous cavities within it?
1. Introduction to Anatomy & Physiology
Organization of the Body: Serous Membrane Locations
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In the organization of the body, which serous membrane forms the loose-fitting sac surrounding the heart?
A
Pleura
B
Synovial membrane
C
Peritoneum
D
Pericardium
Verified step by step guidance1
Understand that serous membranes are thin layers of tissue that line certain internal cavities of the body and cover the organs within these cavities, providing lubrication to reduce friction during organ movement.
Identify the three main serous membranes: the pleura (surrounding the lungs), the peritoneum (lining the abdominal cavity and covering abdominal organs), and the pericardium (surrounding the heart).
Recognize that the question asks specifically about the serous membrane forming the loose-fitting sac around the heart, which is a key anatomical feature protecting and anchoring the heart.
Recall that the pericardium is the serous membrane that forms this sac, consisting of two layers: the fibrous pericardium (outer layer) and the serous pericardium (inner layer), which includes the parietal and visceral layers with pericardial fluid in between.
Conclude that among the options given, the pericardium is the correct serous membrane that forms the loose-fitting sac surrounding the heart.
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