7th Class Science Transportation in Animals and Plants Question Bank Self Test-8

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    "Our body not only store food in the form of fat but also oxygen for emergency. Lung is a bag like structure which is used to store air.' Give a correct explanation in order to prove the above statement as incorrect.

    A)  Our body has not adapted to store the air inside the body as the environment in which we live is full with air. Lung is not used to store air although it provides larger surface area in order to filter respiratory gasses efficiently and effectively

    B)  To meet the emergency situation, body has developed an improved transportation system for fast carrying of respiratory gasses rather than the organ for storage of air.

    C)  Our body has a very improved respiratory system and it does not require any special organ to store the air.

    D)  Like the heart, lung also expands and contracts. And this movement of lung clears that lung in not a store house

    E)  None of these

    Correct Answer: A

    Solution :


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