Question 6: What is meant by double circulation? What is its significance?
Answer:
Double circulation is a process during which blood passes twice through the heart during one complete cycle. This type of circulation is found in birds, and mammals as in them the heart is completely divided into four chambers – the right atrium, the right ventricle, the left atrium, and the left ventricle.
The movement of blood in an organism is divided into two parts:
(i) Systemic circulation
(ii) Pulmonary circulation
Systemic circulation involves the movement of oxygenated blood from the left ventricle of the heart to the aorta. It is then carried by blood through a network of arteries, arterioles, and capillaries to the tissues. From the tissues, the deoxygenated blood is collected by the venules, veins, and vena cava, and is emptied into the right auricle.
Pulmonary circulation involves the movement of deoxygenated blood from the right ventricle to the pulmonary artery, which then carries blood to the lungs for oxygenation. From the lungs, the oxygenated blood is carried by the pulmonary veins into the left atrium.
Hence, in double circulation, blood has to pass alternately through the lungs and the tissues.
Significance of double circulation:
The separation of oxygenated and deoxygenated blood allows a more efficient supply of oxygen to the body cells. Blood is circulated to the body tissues through systemic circulation and to the lungs through pulmonary circulation.
Comments
sahi tha bhai dhnayavaad
Wow nice easy
Thanks a lot..it is more easier to study
Thanks for the answer it is very useful for me â˺
Learnt a more Thanks
It proves very helpful for me... Thanks a lot
Thanks for this.. It is so easy to learn .
Thanks for this.. It is so easy to learn
It's very helpful for me ....thank u so much....I understand it very clearly and easily without any problems or issues or any doubts.....thanku thanku so much....really helpful and I loved it....
Think you for your answer