The phases are: 1. G1 (gap1) phase 2. S (synthesis) phase 3. G2 (gap 2) phase 4. M (mitosis) phase. Cell Cycle: Phase # 1.
The Cardiac Cycle. The cardiac cycle includes all of the events that take place during one heartbeat. There are 3 phases to the cardiac cycle: atrial systole, ventricular systole, and relaxation. Atrial systole: During the atrial systole phase of the cardiac cycle, the atria contract and push blood into the ventricles.
I hope, the heart diagram and the blood flow chart given above is clear to you. As the work of a heart is critical and essential, even a small blockage in the blood flow may be fatal. There are many heart conditions which if not taken care in time may even result in death.