2007-02-17 10:01:15 · 2 answers · asked by TINA:] 1 in Health ➔ Diseases & Conditions ➔ Respiratory Diseases
pushes the air out of the lungs during expiration.
2007-02-17 10:11:55 · answer #1 · answered by iroc 7 · 0⤊ 0⤋
The diaphram contracts......basically pulls the lungs down......increasing the area of the lungs and that causes a negative pressure to develop inside. This will cause the outside air to rush in. The diaphram also works with the intercostal muscles of the ribs, which also expand. The diaphram and the intercostal muscles continue to contract, eventually making the pressure inside your lungs greater than outside air. The diaphram and the intercostal muscles will "release" or just quit contracting, allowing for the exhalation to begin. Usually the exhalation doesn't require any muscle use, but it could in times of emergency. An example of this type of emergency is an asthma attack. Hope I've explained this to you that you can understand easily. Best of luck to you.
2007-02-17 10:14:48 · answer #2 · answered by cajunrescuemedic 6 · 1⤊ 0⤋