Question
Which of the anatomic structures listed below is seen most anteriorly in a lateral projection o the chest
| A. |
Esophagus
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| B. |
Trachea
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| C. |
Cardiac apex
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| D. |
Superimposed scapular borders
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Show Answer
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Correct Answer � C
Explanation
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Answer (C) Cardiac apex
The relationship of these three structures is easily appreciated in a lateral projection of the chest. The heart is seen in the anterior half of the thoracic cavity, with its apex extending inferior and anterior.
The air- filled trachea can be seen in about the center of the chest, and the air- filled esophagus is seen just posterior to the trachea. The superimposed vertebral and axillary borders of the scapulae would be seen most posteriorly
