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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
The diagram below represents the human heart in one phase of its function. Study the diagram carefully and answer the questions that follow:
(i) Name the phase.
(ii) Which part of the heart is contracting in this phase? Give a reason to support your answer.
(iii) Name the parts labelled 1 to 4.
(iv) What type of blood flows through ‘2’?
(v) State the function of the part numbered ‘5’.
(vi) Name the membrane that covers the heart.
Draw the structure of a human heart and label its parts.
Why is it necessary to know the blood groups before giving transfusion?
Differentiate between members of the following pairs with reference to the aspect asked
within bracket:
Erythrocytes and leucocytes (function)
What is Endothelium?
Fill in the blanks with suitable words given below:
The carbon dioxide loaded blood from right ventricle is pumped into the lungs through ______.
Distinguish between Intrinsic and extrinsic process of clotting
Spleen is referred to as ______.
Ventricles have ______ walls when compared with those of auricles.
