Define inspiration and expiration.

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Posted by Bindusar Maurya 5 years, 3 months ago

Yogita Ingle 5 years, 3 months ago

Inspiration and expiration are two processes involved in respiration. Inspiration is the process of taking in of the air and expiration is the breathing out of the air.
During inspiration, there is an increase in the volume of the thoracic area. The diaphragm becomes flattened and there is the relaxation of the intercostal muscles. This allows the increase in the thoracic cavity and allows the lungs to expand and take the air inside.
During expiration, there is a decrease in the volume of the thoracic cavity due to diaphragm being dome-shaped and contraction of the intercostal muscles. This allows the lungs to push the air outside.

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