Question

what is a double circulation explan with schematic diagram

Answer 1

In human beings, the blood goes through the heart twice during each cycle i.e. the blood passes through the human heart two times to supply once to the whole body. So, it is called Double Circulation of blood. The double circulation of blood includes: (i) Systematic Circulation (ii) Pulmonary Circulation Systematic Circulation: It supplies oxygenated blood from the left auricle to left ventricle, thereby pumped to various body parts. The deoxygenated blood is collected from the various body organs by the veins to pour into vena cava and finally into the right atrium (auricle). Right atrium transfers the blood into the right ventricle. Pulmonary Circulation: The deoxygenated blood is pumped by the right ventricle into the lungs for oxygenation. The oxygenated blood is brought back to left atrium (auricle) of the human heart. From the left atrium, the oxygenated blood is pushed into the left ventricle. The left ventricle pumps oxygenated blood into the aorta for systematic circulation

Answer 2

During a single cycle of blood circulation  occurs twice in the heart and this cycle is known as double circulation. This cycle is necessary for human being in separating oxygenated and deoxygenated blood because this makes their circulatory system more efficient and helps in maintaining body temperature. The process consists of a systolic and diastolic cycle.