Lesson: Chapter 6 — Human body processes

Heartbeat, blood pressure and lymph 4 of 5 Reset answers

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Question 4

Which part of the heart cycle lasts longest?

A Ventricular systole B Diastole C They are all equal D Atrial systole

The right answer is the one marked above.

Diastole. It lasts about 0.4 s, against 0.3 s for ventricular systole and 0.1 s for atrial systole.

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