Question 81: Describe the flow of blood through the heart of human beings.
Answer:
The flow of blood through the heart of human beings possess the process of double circulation involves two parts – pulmonary and systemic circulation.
In systemic circulation, the exchange of blood takes place between heart and body. The oxygenated blood from left ventricle is pumped into the aorta for further transportation of blood in the body and the deoxygenated blood from the body enters the right auricle through vena cava; and from right auricle the blood is pumped into the right ventricle of the heart by the body tissues. The tricuspid valves between the right atrium and right ventricle prevent the backflow of blood.
In pulmonary circulation, the exchange of blood takes place between heart and lungs. The deoxygenated blood from right ventricle is pumped into the lungs through the pulmonary artery and from lungs carbon dioxide is removed from the blood or oxygen enters into it, make oxygenated blood which goes to left auricle through pulmonary vein; and from left auricle the blood is pumped into left ventricle.
Then from the left ventricle, blood is pumped and systemic circulation again takes place.
Diagram:
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