Our heart is not called double circulation ....as it is called double pump...............Human's hearth is adouble pump because the right ventricle of the heartsends blood through the lungs, and the left ventricle sends blood throughout the bodydouble circulation in heart: The double circulatory system of blood flow refers to the separate systems of pulmonary circulation and the systemic circulation in amphibians, birds and mammals (including humans.) In contrast, fish have a single circulation system because they do not have lungs. All animals with lungs have a double circulatory system.Double circulation has two routes or circuits.Heart—lung—heart(pulmonary circulation)Heart—body—heart(systemic circulation)The right ventricle pumps the blood throughout pulmonary artery to the lungs for purification. After being purified, the blood returns to the left auricle through the pulmonary vein. From here the blood comes to the left ventricle and then from here it is pumped to the arteries to the rest of the body. The impure blood then returns to the right auricle and then goes to the right ventricle.

Heart is only a part in our body which can never stop it works always non stop .it is not called double circulation it is the process of pumping of blood by which the blood will give to whole body