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.
Phase 1: Atrial systole: Blood under low pressure flows into the left and right atria from the pulmonary vein (left) and vena cava (right). As atria fill pressure against atrioventricular valves pushes them open and blood starts leaking into the ventricles.