Question: what are the steps of blood flow through the heart?
Answer: Deoxygenated blood enters right atrium through Superior and Inferior Vena Cava. [00:17] Blood enters right ventricle through tricuspid valve. [00:43] Blood exits right ventricle through pulmonary valve and enters pulmonary artery. [00:49] Oxygenated blood returns to heart via the pulmonary veins  enters left atrium. [01:14]