In the described path from the left ventricle to the right atrium, what is the pressure in the right atrium?

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Multiple Choice

In the described path from the left ventricle to the right atrium, what is the pressure in the right atrium?

Explanation:
The right atrium sits at a very low pressure as venous return enters the heart. In many teaching models, its pressure is taken as zero to serve as a reference point for the whole circulation. So along the path back to the heart, the pressure in the right atrium is 0 mmHg. The other values correspond to pressures in the left-sided ventricle or systemic arteries, which are much higher and not representative of the venous return phase.

The right atrium sits at a very low pressure as venous return enters the heart. In many teaching models, its pressure is taken as zero to serve as a reference point for the whole circulation. So along the path back to the heart, the pressure in the right atrium is 0 mmHg. The other values correspond to pressures in the left-sided ventricle or systemic arteries, which are much higher and not representative of the venous return phase.

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