Which heart chamber lies most anteriorly against the sternum?

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Multiple Choice

Which heart chamber lies most anteriorly against the sternum?

Explanation:
The right ventricle sits directly behind the sternum and forms most of the sternocostal (anterior) surface of the heart. That makes it the chamber lying closest to the sternum. The right atrium is more toward the posterior and right border, while the left ventricle and left atrium are situated more to the left and posterior aspects of the heart, with the apex formed mainly by the left ventricle. So, the chamber directly anterior to the sternum is the right ventricle.

The right ventricle sits directly behind the sternum and forms most of the sternocostal (anterior) surface of the heart. That makes it the chamber lying closest to the sternum. The right atrium is more toward the posterior and right border, while the left ventricle and left atrium are situated more to the left and posterior aspects of the heart, with the apex formed mainly by the left ventricle. So, the chamber directly anterior to the sternum is the right ventricle.

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