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a dome-shaped muscular partition separating the thorax from the abdomen in mammals. It plays a major role in breathing, as its contraction increases the volume of the thorax and so inflates the lungs.
Chickens don’t have a diaphragm, and their lungs can’t contract. They breathe by moving their entire ribcage to draw air into the lungs. That’s why you can accidentally stop a chick from breathing if you hold it with a firm grip. Chickens also have air sacs and a double respiration cycle.
a body partition of muscle and connective tissue
AmieLynn is continuing to recover from a recent surgery that improved her chest incision and created more space for her heart, diaphragm and lungs.