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allows your ribs to move up and down when you breath

the intercostal muscles contract.these pull the ribcage upwards.so the chest increases in volume when we breath out the intercostal muscles relax which lowers the ribcage.the chest decreases in volume see the diagram below for help

The intercostal muscles are located between the ribs and they lift the diaphragm allowing oxygen to flow in and out of the lungs. Basically, they aid in breathing.

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9y ago

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