With respect to the contents of the posterior mediastinum, all are true except:

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The oesophagus is 25cm in length

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The oesophagus extends from the level of cricoid cartilage to traverse the diaphragm at T10

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The descending thoracic aorta gives off the posterior intercostals arteries

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It contains the perihilar lymph nodes

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The descending aorta commences at the lower level of T4 vertebra

1.	With respect to the contents of the posterior mediastinum, all are true except:
A.	The oesophagus extends from the level of cricoid cartilage to traverse the diaphragm at T10
B.	The descending thoracic aorta gives off the posterior intercostals arteries
C.	It contains the perihilar lymph nodes
D.	The oesophagus is 25cm in length
E.	The descending aorta commences at the lower level of T4 vertebra
Answer» D. The oesophagus is 25cm in length

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