<P> This happens due to elastic properties of the lungs , as well as the internal intercostal muscles which lower the rib cage and decrease thoracic volume . As the thoracic diaphragm relaxes during exhalation it causes the tissue it has depressed to rise superiorly and put pressure on the lungs to expel the air . During forced exhalation , as when blowing out a candle , expiratory muscles including the abdominal muscles and internal intercostal muscles generate abdominal and thoracic pressure , which forces air out of the lungs . </P>
<P> This happens due to elastic properties of the lungs , as well as the internal intercostal muscles which lower the rib cage and decrease thoracic volume . As the thoracic diaphragm relaxes during exhalation it causes the tissue it has depressed to rise superiorly and put pressure on the lungs to expel the air . During forced exhalation , as when blowing out a candle , expiratory muscles including the abdominal muscles and internal intercostal muscles generate abdominal and thoracic pressure , which forces air out of the lungs . </P>
all of the air that can be forced out of your lungs following a normal expiration is called
all of the air that can be forced out of your lungs following a normal expiration is called
forced exhalation
forced exhalation