explain the process of double circulation and trace its pathway
Answers
A circulatory system in which the blood makes two distinct circuits — compare pulmonary circulation, systemic circulation is Know as Double Circulation.
The human heart is divided into four chambers:
Left Atria
Right Atria
Left Ventricles
Right Ventricles
Further, the heart is connected to the lungs through the pulmonary artery and vein. In double circulation, there are two pathways in which the blood flows. They are:
Systemic circulation
In the systemic circulation, the blood circulation starts from the left atrium of the heart to the left ventricle of the heart.
The oxygen-rich blood is transferred to the aorta for circulating into various parts of the body.
The deoxygenated blood is pumped back into the superior vena cava and then to the right atrium.
Once after receiving the deoxygenated blood, the right atrium carries blood to the right ventricle for pulmonary circulation.
Pulmonary circulation
In the pulmonary circulation, the blood circulation starts from the right atrium to the left atrium. In this pathway:
The pulmonary artery collects the blood from the right ventricle and carries to lungs for oxygenation.
Once after the purification process, the oxygenated blood is pumped back to the left atrium through the pulmonary vein which is carried to the left ventricles.
The left ventricles pump the oxygenated blood to the aorta for systemic circulation.
Double circulation supports a strict separation of both oxygenated and deoxygenated blood. Therefore, this circulation ensures that the body always has a dedicated supply of oxygen and also, it improves the body efficiency.