Answer
The superior and inferior vena cava carry oxygen-poor blood to the right atrium. The left and right atrium then contract and push blood through an atrioventricular valve to the right ventricle.
After this, the right ventricle contracts and pushes the oxygen-poor blood to the pulmonary trunk, which then divides the blood into two pulmonary arteries that flow to the lungs.
Pulmonary capillaries in the lungs provide oxygen to the blood and remove carbon dioxide.
Finally, four pulmonary veins carry the oxygen rich blood back to the left atrium.
Work Step by Step
The superior and inferior vena cava carry oxygen-poor blood to the right atrium. The left and right atrium then contract and push blood through an atrioventricular valve to the right ventricle.
After this, the right ventricle contracts and pushes the oxygen-poor blood to the pulmonary trunk, which then divides the blood into two pulmonary arteries that flow to the lungs.
Pulmonary capillaries in the lungs provide oxygen to the blood and remove carbon dioxide.
Finally, four pulmonary veins carry the oxygen rich blood back to the left atrium.
