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प्रश्न
Describe how the exchange of oxygen and carbon dioxide gases takes place in the lungs.
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उत्तर
At the time of respiration, the external air reaches up to the alveoli in the lungs. The oxygen in the air enters the blood vessels, which surround the alveoli. Through the network of blood vessels, oxygen is supplied to the entire body. At the same time, carbon dioxide is brought by the circulating blood into the alveoli. From here, carbon dioxide is given out of the body through exhalation. In this way, the exchange of oxygen and carbon dioxide gases takes place in the alveoli of the lungs.
संबंधित प्रश्न
What is Diapedesis?
Name the following:
The phase of the cardiac cycle in which the auricles contract.
Name the three kinds of blood vessels found in human beings. With the help of suitable diagrams, differentiate between them.
Given below is the simplified pathway of the circulatory system:
(i) Name the blood vessels marked 1 to 8.
(ii) Name the chamber of the heart which:
(a) Receives blood from ‘1’.
(b) Pumps blood into blood vessel ‘8’.
(iii) Mention two structural differences between blood vessels ‘7’ and ‘2’.
State the Location: Bicuspid value
Name the systems that carry out the different functions of the body.
Explain the main parts of the circulatory system.
Thin tube-like structures which are the component of circulatory system are called blood vessels.
Analogy
Arteries : Carry blood from the heart:: _________ :carry blood to the heart.
In a closed circulatory system, blood is completely enclosed within:
