Complete the paragraph given below by filling in the blanks.

Blood flows twice in the heart. In pulmonary circulation, the deoxygenated blood is carried to the from the of the heart, through the . The oxygenated blood from the lungs is carried back to the of the heart through the . This oxygenated blood from the heart is carried to all systems of the body and the deoxygenated blood from the systems below and above the heart is supplied to the of the heart through the _.

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Solution

Blood flows twice in the heart. In pulmonary circulation, the deoxygenated blood is carried to the lungs from the right ventricle of the heart, through the pulmonary artery. The oxygenated blood from the lungs is carried back to the left atrium of the heart through the pulmonary vein. This oxygenated blood from the heart is carried to all systems of the body and the deoxygenated blood from the systems below and above the heart is supplied to the right atrium of the heart through the vena cava.
Since the blood flows in the heart twice, therefore this circulation is known as double circulation.

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Similar questions

(a) Name the blood vessel that brings oxygenated blood to the human heart.
(b) Which chamber of the human heart receives deoxygenated blood?
(c) Describe the process by which deoxygenated blood from this chamber is sent to all parts of the body.

Q. In fishes, a -chambered heart pumps deoxygenated blood to the , and this blood gets oxygenated and moves directly to all the body parts.

Veins and arteries carry blood. Which of these carry blood :
(a) away from the heart ?
(b) back to the heart ?

Q. The diagram shows a section through the human heart. Which blood vessels carry blood to and from the lungs?

The blood vessel which carries oxygenated blood from the lungs to the heart is :
(a) main artery
(b) pulmonary artery
(c) main vein
(d) pulmonary vein

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