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 first heart sound or lub results from closure of the tricuspid and mitral valves. It is a rather low-pitched and a relatively long sound which, as indicated in, represents the beginning of ventricular systole. The second heart sound, or dub, marks the beginning of ventricular diastole.