give reasons why lungs are made up of millions of alveoli
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Lungs are made up of millions of tiny air sacs in the lungs to help in the respiration process.
In fact, bronchial tubes are located within the lungs. They tend to extend and contract depending on the inhalation and the exhalation of the air.
Alveoli play an important role in transferring oxygen to different parts of the body through the blood stream.
In fact, bronchial tubes are located within the lungs. They tend to extend and contract depending on the inhalation and the exhalation of the air.
Alveoli play an important role in transferring oxygen to different parts of the body through the blood stream.
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