The newly oxygen-rich blood (shown in red) returns to the heart and enters the left atrium. Blood flows through the left atrium into the left ventricle. The left ventricle pumps the oxygen-rich ...

The left and right ventricles each pump the same volume of blood through the aorta and pulmonary ... volumeThe volume of blood pumped from the heart with each beat. is the volume of blood pumped ...

only allows blood to pass through one cell at a time Other features Thick muscular walls to withstand blood flowing at high pressure as it leaves the heart; the largest artery is the aorta Contain ...