Did Michael Jordan make the varsity basketball team his junior year. Topics: Sports âº Athletes âº Michael Jordan, Chicago Bulls, Basketball, Celebrities. Reese Dickerson. Yes, after not making the varsity team his sophomore year, Michael Jordan played varsity both his junior and senior year.
The first phase of ventricular systole is known as isovolumetric contraction. During this phase, the pressure in the ventricles increases sharply, but is not yet high enough to open the aortic and pulmonary valves. Therefore, no blood leaves the ventricles.
The second stage, atrial systole , is when the atrium contracts, and blood flows from atrium to the ventricle. The third stage,  isovolumic contraction  is when the ventricles begin to contract, the AV and semilunar valves close, and there is no change in volume.