'Separating the thorax from the abdomen, it's the chief muscle of respiration'
the diaphragm
THE HUMAN BODY: Separating the thorax from the abdomen, its the chief muscle of respiration
Separating the thorax from the abdomen, it's the chief muscle of respiration
Separating the thorax from the abdomen, it's the chief muscle of respiration
THE HUMAN BODY
the diaphragm
THE HUMAN BODY