1
Question
How are
the lungs designed in human beings to maximize the area for exchange
of gases?
How are the lungs designed in human beings to maximize the area for exchange of gases?
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Solution
The
exchange of gases takes place between the blood of the capillaries
that surround the alveoli and the gases present in the alveoli. Thus,
alveoli are the site for exchange of gases. The lungs get filled up
with air during the process of inhalation as ribs are lifted up and
diaphragm is flattened. The air that is rushed inside the lungs fills
the numerous alveoli present in the lungs.
Each lung
contains 300-350 million alveoli. These numerous alveoli increase the
surface area for gaseous exchange making the process of respiration
more efficient.
The exchange of gases takes place between the blood of the capillaries that surround the alveoli and the gases present in the alveoli. Thus, alveoli are the site for exchange of gases. The lungs get filled up with air during the process of inhalation as ribs are lifted up and diaphragm is flattened. The air that is rushed inside the lungs fills the numerous alveoli present in the lungs.
Each lung contains 300-350 million alveoli. These numerous alveoli increase the surface area for gaseous exchange making the process of respiration more efficient.
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