Explain how the heart can be in the thoracic cavity but not the pleural cavity
A) The pleural cavity is only associated with the lungs.
B) The thoracic cavity contains all organs protected by the ribs, sternum, and thoracic vertebrae.
C) The mediastinum is a double-walled membrane surrounding the heart but not the lungs.
D) The pericardial cavity encloses the heart as well as the lungs.
Answer: A
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