EMBRYOLOGY
RESPIRATORY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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When the lungs expand, there is ____ space in them, so air from the outside enters the lungs.
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more
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less
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -Breathing in When you breathe in, or inhale, your diaphragm contracts and moves downward. This increases the space in your chest cavity, and your lungs expand into it.
Detailed explanation-2: -When you breathe out, or exhale, your diaphragm relaxes and moves up into your chest cavity. As the space in your chest cavity gets smaller, air rich in carbon dioxide is forced out of your lungs and windpipe, and then out your nose or mouth.
Detailed explanation-3: -Breathing is the process that brings oxygen in the air into your lungs and moves oxygen and through your body.
There is 1 question to complete.