Muscles of Expiration
During quiet breathing, there is little or no muscle contraction/relaxation involved in expiration. This process is simply driven by the elastic recoil of the lungs in healthy individuals. In certain conditions the elasticity of the lung can be lost, such as in emphysema. Forced or active expiration occurs in such individuals as well as occurring during exercise. The abdominal muscles and the internal and innermost intercostal muscles help expel air.
Read more about this topic: Muscles Of Respiration
Famous quotes containing the words muscles of and/or muscles:
“All of this,
and the curious knee-cap,
fitted above the wrought greaves,
and the sharp muscles of your back
which the tunic could not cover.”
—Hilda Doolittle (1886–1961)
“The indispensable ingredient of any game worth its salt is that the children themselves play it and, if not its sole authors, share in its creation. Watching TV’s ersatz battles is not the same thing at all. Children act out their emotions, they don’t talk them out and they don’t watch them out. Their imagination and their muscles need each other.”
—Leontine Young (20th century)