When we breathe IN. The ____ contracts and moves ____. The ribs move ____ and out. This ____ the volume inside the chest. This ____ the pressure inside the chest. This draws air ____ the lungs. When we breathe OUT. The diaphragm ____ and moves up. The ____ move down and in. This ____ the volume inside the chest. This ____ the pressure inside the chest. This draws air ____ the lungs.

Breathing

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