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 3: Diastole: Atria and ventricles relax during diastole. Elastic recoil lowers pressure in the atria and ventricles. Blood under higher pressure in the arteries is drawn back towards the ventricles, closing the semi-lunar valves and preventing further backflow. The coronary arteries fill during diastole. Low pressure in the atria helps draw blood into the heart from the veins.