18. What is respiration? Describe the series of changes that occur around rib
cage, diaphragm and chest cavity during the process of inspiration.
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During inspiration, the diaphragm contracts and pulls downward while the muscles between the ribs contract and pull upward. This increases the size of the thoracic cavity and decreases the pressure inside. As a result, air rushes in and fills the lungs.
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Respiration is defind as biochemical process where in the living cell of organisms by taking O2 and liberating CO2 from the oxidation of complex organic substance
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