Vertebrates, and that includes us, breathe into the lungs which are inside our chest. An vital part of our breathing action is the rib cage, and in its base is the diaphragm. The ribs go down and to the front as they expand and contact by method of the intercostal muscle. The result of this is greater volume of air in the chest cavity.
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Wednesday, April 20, 2011
Oxygen And How We Breathe
