explain the process of inspiration and experation under normal condidions.
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Inspiration is the process of taking air from the atmosphere into the lungs. It is done by creating a pressure gradient between the lungs and the atmosphere. During inspiration, the diaphragm contracts and the space in the thoracic cavity increases. ... This ultimately results in increase in the pulmonary volume.
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Inspiration-
Expiration --- Expiration takes place when the intra-pulmonary pressure is higher than the atmospheric pressure. ... Relaxation of the diaphragm and the intercostal muscles returns the diaphragm and sternum to their normal positions after inspiration which reduces the thoracic volume and thereby the pulmonary volume.
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