Define mediastinum
A) The mediastinum is the region that contains each lung.
B) The mediastinum is the region between the two pleural cavities that contains the heart, along with the great vessels, thymus, esophagus, and trachea.
C) The mediastinum is the region anterior to the sternum that is pressed during cardiac pulmonary resuscitation.
D) The mediastinum is the region from the diaphragm to the superior border or the rib cage and from each lateral side of the rib cage.
E) The mediastinum is the serious membrane that surrounds the heart.
Answer: B
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