In the following illustration, the arrows points to a line that represents the:
A) separation between the superior thoracic aperture and the mediastinum.
B) separation between the superior mediastinum and the inferior mediastinum.
C) separation between the superior and inferior thoracic lymph drainage areas.
D) separation between the axillary and abdominal lymph drainage of the breast.
E) level of the jugular notch.
Ans: B
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