Question

draw a schematic sectional views of human heart and explain the circulation path of blood in human beings​

Answer 1

Answer:

Humans have a four-chambered heart and the type of blood circulation is called as double circulation. The blood pumped by the right ventricle enters the pulmonary artery, whereas the left ventricle pumps blood into the aorta. The deoxygenated blood pumped into the pulmonary artery is passed onto the lungs from where the oxygenated blood is carried by the pulmonary veins into the left atrium. This pathway constitutes the pulmonary circulation. The oxygenated blood entering the aorta is carried by a network of arteries, arterioles and capillaries to the tissues from where the de-oxygenated blood is collected by a system of venules, veins and vena cava and emptied into the right atrium. This is the systemic circulation. These two processes are together called as double circulation. This process is necessary because the blood enters twice in the heart in a single cycle. The deoxygenated and the oxygenated blood does not get mixed and the circulation is maintained properly.

Answer 2

Answer:

Explanation:

The deoxygenated blood comes to the heart through veins. From heart oxygenated blood is distributed to all parts of the body. ... Since blood flows twice through the heart in one cycle, it is called double circulation.