Question

Give reasons for :- There is sufficient time for the gaseous exchange in lungs.

Answer 1

Explaination:

there is sufficient time for exchange of gases in our lungs as all the gas from are lungs is not exhaled. some gas is retained .

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Answer 2

Answer:

• Because during expiration/exhalation the lungs don't get completely empty it has some volume of air inside.
• The air left inside the lung after expiration is called Residual Volume which is 1100ml .
• we have sufficient for gaseous exchange as it occurs due to diffusion , pressure gradient and partial pressure of O2 and CO2
• While expiring pressure is high inside the lungs and lower outside so the air from lungs gushes out in the atmosphere.
• while inspiring the pressure is high outside in atmosphere and low inside the lungs so the air gushes inside the lungs from the Atmosphere.
• Inspiration takes = 2 seconds
• Expiration takes = 3 seconds
• A healthy human breaths 12-16 times per minute
• A healthy infant breathes 44 times per minute .

Explanation:

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