In double circulation, blood passes through the heart how many times for every complete circuit of the body?, Once, Twice, three time, four time, In the pulmonary circulation pathway, which of the following correctly describes the sequence of blood flow?During the cardiac cycle, what happens to the atrioventricular (AV) valves when the ventricles contract?, They open to allow blood into the ventriclesRight ventricle → Aorta → Lungs → Left atrium, They close to prevent backflow of blood into the atriaLeft ventricle → Pulmonary artery → Lungs → Right atrium, They remain in a half-open positionRight ventricle → Pulmonary artery → Lungs → Left atrium, They open to allow blood into the aortaLeft atrium → Pulmonary vein → Lungs → Right ventricle, In the pulmonary circulation pathway, which of the following correctly describes the sequence of blood flow?, Right ventricle → Aorta → Lungs → Left atrium, Left ventricle → Pulmonary artery → Lungs → Right atrium, Right ventricle → Pulmonary artery → Lungs → Left atrium, Left atrium → Pulmonary vein → Lungs → Right ventricle

Double circulation

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