The following graph demonstrates the blood pressure changes in the left ventricl

Question

The following graph demonstrates the blood pressure changes in the left ventricle (red), left atrium (blue), and aorta (black) during the cardiac cycle. Match each event in column A with the correct arrow in column B.

g graph demonstrates the blood pressure changes in the left ventricle (red), left atrium (blue), and aorta (black) during the cardiac cycle. Match each event in column A with the correct arrow in column B. Answers ATRIAL DIASTOLE ATRIAL SYSTOLE DIAS VENTRICULAR DIASTOLE ICULAR OL VENTRICULAR DIASTOLE 120 Aorta 90 60 Left ventricle Left atrium 100 200 300 400 500 600 700 800 Time (msec)

Explanation / Answer

11) Aortic valve closes - arrow C

12) First heart sound occurs - arrow A

13) left AV valve opens - arrow D

14) left AV valve closes - arrow A

15) aortic valve opens - arrow B

16) second heart sound occurs - arrow C

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