Cardiac Cycle
The pressure in the ventricles is low during
early in diastole.
About______% of the blood flows passively from the atria into ventricles and the remaining blood is pushed into the ventricles when the___________________.
70; ventricular pressure increases.
As blood flows out of the ventricles, ventricular pressure
Begins to drop
During ventricular systole, ventricular pressure increases and the____________valves open.
Pressure differences across the semilunar valves cause the pulmonary and aortic
During a cardiac cycle, the pressure within the heart chambers
Rises and falls, and these changes open and close valves.
During diastole, the A-V valves are
opened and ventricles fill up.
The semilunar valves close when
The ventricular Pressure is lower than the blood pressure in the aorta and pulmonary trunk, and the pressure is reversed.