Which of the Following Includes Only Structures Enclosed Within the Mediastinum

Question

Which of the following includes only structures enclosed within the mediastinum?
A) lungs, esophagus, heart
B) heart, trachea, lungs
C) esophagus, trachea, thymus
D) pharynx, thymus, major vessels
E) brain, spinal cord

Accepted Answer

The mediastinum is the space between the lungs that contains many structures including the esophagus, trachea, and thymus. Choice A includes the lungs which are not enclosed within the mediastinum, while choice B includes the trachea which is enclosed within the mediastinum but also includes the lungs which are not. Choice D includes the pharynx which is not located within the mediastinum. Choice E includes the brain and spinal cord which are not located within the chest cavity.