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Blood pressure in the mammalian aorta is maximum during:

1. Diastole of the right ventricle.
2. Systole of the left ventricle.
3. Diastole of the right atrium.
4. Systole of the left atrium.

Correct answer: Systole of the left ventricle.

Solution

The aorta receives blood directly from the left ventricle, so its pressure is highest when the left ventricle contracts and ejects blood. During diastole, aortic pressure falls as blood flows onward into the systemic circulation.

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