Fill in the Blanks The circulatory systemOnline version The system that helps and control the flow of the blood around the body. by lorenza aceves 1 arteries veins capillaries the The from the the returns carbon into heart were left The main parts of the system are The , , and . Blood begins to circulate from the heart The path of the blood at the begining is ventricle aorta largest artery in body is the aorta The blood is rich of oxygen The veins are blood to the heart , and dioxide is removed of blood after the circulation