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प्रश्न
Why is the circulation in man referred to as double circulation?
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उत्तर
In humans, blood passes twice through the heart to supply once to the body.
Double circulation involves:
(i) Systemic circulation,
(ii) Pulmonary circulation.
(i) Systemic circulation: In the systemic circulation, from the left ventricle blood is pumped into the aorta and to various parts of the body.
(ii) Pulmonary circulation: In pulmonary circulation, from the right ventricle deoxygenated blood is pumped into the pulmonary artery which carries blood to the lungs for oxygenation.
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संबंधित प्रश्न
Blood in the human body circulates twice for making one complete round through the body. Explain.
The diagram represents the ‘closed system’ or ‘double circulation’ of blood in mammals.
Justify the above statement.
State two structural and two functional differences between the arteries and veins.
State the changes in the composition of blood as it passes through the following organs:
(a) Lungs (b) Gut (c) Liver (d) Kidneys.
In the given diagram, 'X' indicates ______
Single circulation, i.e., blood flows through the heart only once during one cycle of passage through the body, is exhibited by which of the following:
In double circulatory system, the function of veins is to carry ______.
Explain the advantage of the complete partition of ventricle among birds and mammals and hence leading to double circulation.
What is the significance of hepatic portal system in the circulatory system?
Why is the separation of the right side and the left side of the heart useful? How does it help birds and mammals?
Why is the double circulation of blood in human beings necessary?
From where to where do the following blood vessel carry blood?
Hepatic portal vein
