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प्रश्न
Describe the function of the heart.
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उत्तर १
- The heart contains four chambers: two upper chambers, known as atria, and two lower chambers, known as ventricles. The left and right chambers are entirely divided to prevent the mixing of oxygen- and carbon dioxide-rich blood.
- The vena cava (main vein) transports deoxygenated blood from all over the body to the right atrium. This blood is pumped from the right atrium to the right ventricle, which subsequently delivers it to the pulmonary artery, which carries blood to the lungs for oxygenation.
- The left atrium receives oxygenated blood via pulmonary veins (2 each from the right and left lungs). The blood is subsequently pumped into the left ventricle, which in turn pumps it into the aorta (main artery), where it is distributed throughout the body.
The circulation of blood can be illustrated by the following flow chart:
उत्तर २
- The heart circulates pure blood throughout the body and into the sea.
- The blood in the body is mixed and circulated to the lungs, heart and liver for purification.
- The heart transports water and other useful medicines to all the seas through the blood.
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संबंधित प्रश्न
Give technical terms for The protective covering of the heart
Differentiate between members of the following pairs with reference to the aspect asked
within bracket:
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Differentiate between members of the following pairs with reference to the aspect asked within bracket:
artery and vein (type of blood primarily flowing through)
Fill in the blanks with suitable words given below:
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The lymphatic system consists of which of the following?
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Identify the function of the erythropoietin hormone produced by kidney cells.
Given below are four statements regarding human blood circulatory system:-
- Arteries are thick walled and have narrow lumen as compared to veins.
- Angina is acute chest pain when the blood circulation to the brain is reduced.
- Persons with blood group AB can donate blood to any person with any blood group under ABO system.
- Calcium ions play a very important role in blood clotting.
Which two of the above statements are correct?
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Can you answer why the pulmonary artery shown in Fig. is blue in colour?
