Answer: The role of the septum is to separate the right and the left side of the heart, thus preventing deoxygenated and oxygenated blood from mixing.
There is a valve through which blood passes before leaving each chamber of the heart. The valves prevent the backward flow of blood.
Systole, period of contraction of the ventricles of the heart that occurs between the first and second heart sounds of the cardiac cycle (the sequence of events in a single heart beat). the Diastole is correct those others r a little out of order
Step-by-step explanation: