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what takes place when you inhale and exhale?



Sagot :

inhale- oxygen
exhale- carbon dioxide; deoxygenated gas
When you inhale-the intercostal muscles contract, expanding the ribcage- the diaphragm contracts, pulling downwards to increase volume of the chest- pressure inside the chest is lowered air is sucked into the lungs.
When you exhale-the intercostal muscles relax, ribcage drops inwards and outwards- the diaphragm relaxes, moving back upwards to decrease volume of the chest- pressure inside the chest increases and air is forced out.