the cardiac cycle

Question 1

what happens to the ventricles in diastole ?

Answer 1

relax

Question 2

what happens to the atria in diastole and why ?

Answer 2

relax and blood flows into it due to higher pressure in the vena cava and pulmonary vein

Question 3

what happen to the semi lunar valves in diastole and why ?

Answer 3

close due to high pressure in aorta in the pulmonary artery

Question 4

what happens to the atria in diastole and why (2)?

Answer 4

pressure less then the atria in the ventricles . Atria contracts decreasing the volume and increasing the pressure , pushing the blood into the ventricles

Question 5

what happens to the AV valves in diastole?

Answer 5

open allowing blood to flow passively into the ventricles

Question 6

what happens to the ventricles in Atrial systole ?

Answer 6

relaxed

Question 7

what happens to the atria in atrial systole ?

Answer 7

contract , decreasing the volume and increasing the pressure ,pushing blood into the ventricles

Question 8

what happens to the ventricles in atrial systole ?

Answer 8

blood pushed into ventricles from atria

Question 9

what happens to ventricular pressure and volume and why in atrial systole?

Answer 9

increases slightly due to the blood ejected from the contracting atria

Question 10

what happens to the atria in ventricular systole ?

Answer 10

relax

Question 11

what happens to the ventricles in ventricular systole ?

Answer 11

contract ,decreasing volume and increasing pressure

Question 12

what happens to the atrioventricular valves in ventricular systole?

Answer 12

pressure higher in the ventricles than in the atria so they close to prevent backflow of blood

Question 13

what happens with the semi lunar valves in ventricular systole and why ?

Answer 13

pressure higher in aorta than in pulmonary artery so semi lunar valves open so blood is forced out through the semi lunar valves into the arteries .