Editing Bottle Diaphragm (section)

== Why This Works ==

''Respiration'' is the action of breathing. One might already know that to breathe they use their lungs, but the lungs don't do the inflating by themselves. The lungs get help from another muscle called the ''Diaphragm'', which is a big flat muscle right below the lungs. When you breathe in, the diaphragm pushes down, and causes the area inside the lungs to expand and have a drop in pressure. This pressure drop is how air is pulled into our lungs, and how our bodies can get the oxygen they need. When the diaphragm relaxes, it moves back up and the area inside the lungs returns to normal. This causes an increase in pressure and is how our bodies breathe out, expelling carbon dioxide and other gases.