Alveolus
Alveoli are tiny sacs within our lungs that allow oxygen and carbon dioxide to move between the lungs and bloodstream.
We breathe in oxygen so that parts of our body can use it for many different functions. But we must somehow get the oxygen from our lungs to ourbloodstream,so it can be transported to any places it is needed.
Our bodies produces waste which is carbon dioxide. It must be exhaled from our body.It is the alveoli that are responsible for this tranfer of gases.
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