What occurs during systole?
A)Oxygenated blood is pumped to the lungs.
B)The heart muscle tissues contract.
C)The atrioventricular valves suddenly open.
D)Oxygen-poor blood from all body regions except the lungs flows into the right atrium.
E)All of these occur.

Question

Quizplus · Accepted Answer

During systole, the heart muscle tissues contract to pump blood out of the heart into the arteries. Option A is incorrect as oxygenated blood is pumped from the heart to the body during systole, not to the lungs. Option C is incorrect as the atrioventricular valves close during systole to prevent the backflow of blood into the atria. Option D is incorrect as oxygen-poor blood flows into the right atrium during diastole, not systole.

What Occurs During Systole