Science

9th

grade

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Respiratory System

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20 questions

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  • 1. Multiple Choice
    20 seconds
    1 pt

    What is the main function of the respiratory system?

    to break food down

    supply the blood with oxygen

    absorption of nutrients

    circulate the blood

  • 2. Multiple Choice
    20 seconds
    1 pt

    The trachea is a part of the respiratory system. What can the trachea also be called and what is its function?

    windpipe, filters the air we breathe

    windpipe, releases air out of the body

    tubes; carries air to the lungs

    transport of oxygen

  • 3. Multiple Choice
    20 seconds
    1 pt

    When you breathe out, what gas does the body get rid of?

    When you breathe out your body gets rid of nitrogen gas

    When you breathe out your body gets rid of carbon dioxide gas.

    When you breathe out your body gets rid of carbon monoxide gas.

    When you breathe out your body gets rid of oxygen gas

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