Biology, 06.10.2021 22:20 zakariaaap1
3) Complete the sentences below about breathing: (6)
During inhalation the chest cavity changes shape and size. The contract which causes the rib cage to expand and pushes out the sternum (chest/breastbone). The will contract and will change shape from a concave or dome shape to a flattened shape. The pressure inside the chest cavity will be and therefore allows air to be sucked into the lungs. The air we breathe in is high in and but low in .
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3) Complete the sentences below about breathing: (6)
During inhalation the chest cavity changes sh...
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