Question

write about external respiration​

Answer 1

➡as exchange. It describes both the bflow of air into and out of the lungs and the transfer of oxygen and carbon dioxide into the bloodstream through diffusion....

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Answer 2

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write about external respiration ?

Answer :-

this is the first step of respiration in which external air is drawn inside the body via breathing so that oxygen is reached into the lungs . the used their debt is carbon dioxide is then released finally from the lungs.

Extra Explanation :-

• the exchange of respiratory gases between the blood and alveolar air at the respiratory surface is called external respiration .
• during the breathing cycle when air is taken in and out of the body the lungs always contain a decidual volume of air so that there is a sufficient time for oxygen to be absorbed and the carbon dioxide to be released .

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