The circulatory system or the cardiovascular system is the system consisting of the heart, blood vessels and blood. The whole system is responsible for the transportation of blood. The cardiovascular system sends blood throughout the different organs of the body which helps the cells receive oxygen and essential nutrients. Carbon dioxide and other impurities are also eradicated from the body.qblood cells and platelets. Platelets help in blood clotting when a person suffers hemorrhage or cut.