500
This is the flow of the blood through the human body, including the 4 chambers of the heart.
What is Blood low in oxygen comes from the body into the right atrium, where it is pumped into the right ventricle and then to the lungs. In the lungs, the blood picks up oxygen and then moves to the left atrium and then the left ventricle before being pumped out to the body. Blood flows through arteries and then into capillaries, where oxygen is delivered to tissues. Deoxygenated blood then moves into veins and back to the right atrium of the heart.