Respiration in Terrestial Animals


 
 
Concept Explanation
 

Respiration in Terrestrial Animals

Respiration in Terrestrial Animals:

Terrestrial organisms use atmospheric oxygen for respiration, which is absorbed by different organs in different animals.

  • All these organs have a structure that increase the surface area and is in contact with the oxygen rich atmosphere.
  • Since, the exchange of oxygen and carbon dioxide has to take place across this surface, it is very fine and delicate. To protect this surface it is usually placed within the body wall – protected so there are numerous passages that will take air to numerous passages that will take air to this area.
  • Most mammals such as dogs, monkeys, horses, etc.  respire through special sac like spongy organs called  lungs. Tadpoles breathe through gills, though they  breathe through skin and lungs when they became frogs.

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    Sample Questions
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    Question : 1

    Which of the following are correct ?

    (a) Unicellular animals breathe through their cell membrane.

    (b) In Unicellular animals the exchange of gases take place by the process of diffusion.

     (c) In the unicellular animals if the concentration of carbon dioxide gas is less in the body then it gets diffused out of the body and oxygen get absorbed by the skin.

    Right Option : A
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    Question : 2

    In Cockroaches and other insects oxygen reaches to the cells directly through the _______________ by means of diffusion.

    Right Option : B
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    Question : 3

    Which of the following are correct ?

    (a) Respiratory organs in animals have a structure that increase the surface area and is in contact with the oxygen rich atmosphere .

    (b) Tadpoles breathe through gills, though they breathe through skin and lungs when they became frogs.

    (c) The skin is the respiratory organ in animals like frogs and earthworms .

     

    Right Option : D
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