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Ivan
4 years ago
15

What is the main driving force that directly causes air to flow in and out of the respiratory system? hint: it is the same force

that creates blood flow?
Biology
1 answer:
stiv31 [10]4 years ago
3 0
As the volume of the thoracic cavity changes, it creates<span> a pressure gradient that allows </span>air to flow<span>.</span>
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