Why do our lungs expand during inhalation?
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Answered by
21
because it takes interchanging method of O2 and CO2.
Answered by
33
When you breathe in, or inhale, ourdiaphragm contracts (tightens) and moves downward. This increases the space in your chest cavity, into whichyour lungs expand .
hope it helps you.......?........
hope it helps you.......?........
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