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what is double circulation of blood ? why is it essential for human beings to have double circulation ?

Four chambered heart in human being contains two auricles (left and right) and two ventricles (left and right). The left part of the heart contains oxygenated blood and the right part of the heart contains deoxygenated blood. Thus blood passes two times in one complete circuit – one with oxygenated blood and another with deoxygenated blood. This is double circulation. Double circulation system prevents mixing of oxygenated and deoxygenated blood with each other.

Human are warm blooded. This warm body temperature helps to carry out body processes more efficiently. Maintaining the constant temperature inside the body requires huge amount of energy. Without double circulation system, humans would not be able to receive enough oxygen to produce adequate energy.

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double circulation means blood flows through the heart twice. first circulation is completed when deoxygenated blood is brought to heart and is further pumped to lung for oxygenation. the second circulation pathway is from lungs to heart and then back to the body. so double circulation is important as it helps in oxygenation of blood systematically .

hope it helped :)




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yaah  thankz  it did help me :)

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You might be familiar with the circulation of blood. Now look at this image, this image is a schematic representation of blood circulation.

 

 

Here you can observe that the blood passes through the heart twice. Since the blood goes twice through the heart, it is known as double circulation. Warm-blooded animals like mammals have this type of blood circulation.

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Flow of blood in the human heart

  • The heart has superior and inferior vena cava. They carry deoxygenated blood from the upper and lower regions of the body respectively and supply the deoxygenated blood to the right auricle of the heart.

  • The right auricle contracts and passes the deoxygenated blood to the right ventricle, through an auriculo-ventricular aperture (tricuspid valve).

  • The right ventricle contracts and passes the deoxygenated blood into the two pulmonary arteries, which pumps it to the lungs where the blood is oxygenated. From the lungs, the pulmonary veins transport the oxygenated blood to the left atrium of the heart.

  • The left atrium contracts and through the auriculo-ventricular aperture (bicuspid valve), the oxygenated blood enters the left ventricle.

  • The blood passes to aorta from the left ventricle. The aorta gives rise to many arteries that distribute the oxygenated blood to all the regions of the body.

Since the blood goes twice through the heart, it is known as double circulation.

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double circulation means blood flows through the heart twice. first circulation is completed when deoxygenated blood is brought to heart and is further pumped to lung for oxygenation. the second circulation pathway is from lungs to heart and then back to the body. so double circulation is important as it helps in oxygenation of blood systematically .

hope it helped :)

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