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प्रश्न
Describe the circulatory system of humans.
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उत्तर
- The circulatory system in human beings consists of the heart, blood vessels (arteries, veins and capillaries) and blood.
- Blood circulates throughout the body in blood vessels by the pumping action of the heart.
- The impure blood is carried by veins from all parts of the body to the heart. The heart pumps it into the lungs, where blood is oxygenated and carried back to the heart.
- From the heart, the oxygenated (pure) blood is pumped to all parts of the body through arteries. Thus, the circulatory system forms the transport system carrying food, oxygen, waste products, nutrients, etc. throughout the body.
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संबंधित प्रश्न
Why is blood needed by all the parts of a body?
Mention the exact location of the Pulmonary semilunar valve
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The blood groups of both the donor and recipient must be known before transfusing blood.
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Only the veins and not the arteries are provided with valves.
Draw a neat and labelled diagram.
Internal structure of the heart.
Fill in the blanks with suitable words given below:
The oxygen-rich blood is pumped into different parts of the body through ______.
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Analogy
Lungs: Respiratory system:: _______: Circulatory system.
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