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24 May, 21:59

When we breathe in, our diaphragm and rib muscles cause our chest cavity to expand. How does this action cause air to enter the lungs? A. When our chest cavity expands, static electricity is produced, which attracts air into the lungs. B. When our chest cavity expands, air pressure in the lungs is reduced, causing air molecules to rush into the lungs. C. The expansion of the chest cavity opens the lungs, allowing the force of gravity to pull air molecules into the lungs. D. The expansion of the chest cavity does not cause air molecules to rush into the lungs.

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  1. 25 May, 00:00
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    the answer is b

    Explanation:

    It creates a pressure system
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