ANIMAL PHYSIOLOGY
HUMAN CIRCULATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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During ventricular systole what is happening?
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the ventricles are relaxed and the atria contracted
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the ventricles and the atria are relaxed
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the ventricles and the atria are contracted
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the ventricles are contracted and the atria are relaxed
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Explanation:
Detailed explanation-1: -Ventricular systole: lasts about 0.3 seconds-both ventricles contract, blood is forced to the lungs via the pulmonary trunk, and the rest of the body via the aorta. Atrial diastole: lasting about 0.7 seconds-relaxation of the atria, during which the atria fill with blood from the large veins (the vena cavae).
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