Missouri University of Science and Technology tuition is $7,734 per year for in-state residents. This is 13% more expensive than the national average public four year tuition of $6,841. The cost is 53% cheaper than the average Missouri tuition of $16,299 for 4 year colleges.
Systole: Period of ejection. AV valves closed Semilunar valves opened AV valves closed Semilunar valves closed Diastole: Period of isovolumic relaxation. Blood flowing back toward the relaxed ventricles causes the semilunar valves to close, which is the beginning of ventricular diastole.
Once the left ventricle has emptied, the aortic valve closes to keep the blood that has just been pumped out from re-entering the heart. The valves of the heart open and close in a sequential fashion and are critical to normal heart function. Various conditions can affect the function of the heart valves.