Transport of Gases


 
 
Concept Explanation
 

Transport of Gases

Transport of Gases: In very small organisms, there is no need to have a separate transportation system for gases because all its cells are involved directly in the exchange of gases by diffusion.

  • However, a large multicellular organism needs a mechanism for the transport of gases for its different organs and tissues. Human beings also have a system for transportation of gases.
  • Oxygen is carried by haemoglobin of the red blood cells. Haemoglobin has a great affinity for oxygen – each haemoglobin molecule binds to four molecules of oxygen. The oxygen ‘picked up’ by haemoglobin gets transported with the blood to various tissues.
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    Sample Questions
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    Question : 1

    The oxygen ‘picked up’ by______________________  gets transported with the blood to various tissues.

    Right Option : A
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    Question : 2

    Oxygen is carried by hemoglobin of the ___________________.

    Right Option : A
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    Question : 3

    Which of the following are correct ?

    (a) Large multicellular organism needs a mechanism for the transport of gases for its different organs and tissues.

    (b) Human beings have a system for transportation of gases.

    (c) Oxygen is carried by hemoglobin of the red blood cells. Haemoglobin has a great affinity for oxygen – each hemoglobin molecule binds to four molecules of oxygen.

    Right Option : D
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