8. The esophagus extends from the mouth, beyond the diaphragm muscle to the stom

Question

8. The esophagus extends from the mouth, beyond the diaphragm muscle to the stomach. The descending aorta extends from the heart, beyond the diaphragm to the external liac arterie to the legs The Inferior vena cava returns blood from the lower extremities, beyond the diaphragm muscle to the heart. Which of the structures mentioned above do not go through an opening within the diaphragm but rather passes posterior to the diaphragm? 9. Which intercostal muscles of the ribs are involved in raising the ribs thus resulting in inhalation?

Explanation / Answer

1. Aorta doesn't pierce the diaphragm, rather it passes posteriorly between crura of diaphragm.

2. External intercostal help in inhalation by elevation of ribs thus expansion of chest cavity.

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