blood flow

blood comes in through the superior vena cava--->into the right atrium--->through the tricuspid valve--->now de oxygenated blood in the right ventricle is sent through the pulmonary valve where blood passes through the right pulmonary arteries. blood now travels to the lungs to become oxygenated. once blood off loads carbon dioxide and on loads four oxygen molecules in the capillary beds of the lungs, they start begin their journey back to the heart via left pulmonary arteries. blood enters into the left atrium through and passes through the bicuspid valve. Now blood is entering the left ventricle where the oxygenated blood passes through the aortic valve and into the aorta. oxygenated blood is now distributed through our body.