Explain the Cardiac Cycle

Deoxygenated blood from the body drains into the right atrium of the heart through the superior and inferior vena cava blood vessels. The blood then travels from the right atrium, through the tricuspid valve into the right ventricle, and from there to the lungs via the pulmonary arteries. Blood gets oxygenated in the lungs
Oxygenated blood returns to the heart from the lungs, and into the left atrium through the pulmonary veins. When the atria contracts, the blood passes through the bicuspid valve into the left ventricle. Finally, when the ventricles contract, the blood travels through the aorta to the rest of the body. This oxygenated blood supplies organs, muscle, and tissues with the oxygen they require to function