They contract to pull your rib cage both upward and outward when you inhale. As your lungs expand, air is svcked in through your nose or mouth. The air travels down your windpipe and into your lungs. After passing through your bronchial tubes, the air travels to the alveoli, or air sacs.
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Breathing in
They contract to pull your rib cage both upward and outward when you inhale. As your lungs expand, air is svcked in through your nose or mouth. The air travels down your windpipe and into your lungs. After passing through your bronchial tubes, the air travels to the alveoli, or air sacs.
Answer:
they contact to pull your rib cage both upward and out ward when you inhale
Explanation:
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