Diaphragm
sheet of internal skeletal muscle From Wikipedia, the free encyclopedia
The diaphragm is a muscle that is at the bottom of the ribcage of mammals.

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webreati in, the diapragm puls dow s that the sitzad of the lungs increases, allowing air to enter the lungs. When breathing out, the diaphragm rests and goes up making a dome shape, decreasing the size of the lungs and pushing air out. This increases the surface area of the air so that there is more oxygen that the lungs can hold.
Other websites
- Science Aid: Lungs Archived 2009-07-25 at the Wayback Machine
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