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.
Systole: 1  The atria contract and eject the final amount of blood into the ventricles. 2  Atria relaxation causes atrial pressure to be lower than ventricular pressure. 3  High ventricular pressure relative to the atria causes the AV valves to close, preventing backflow while the ventricles contract.