24. What is the physical
process through which gas
exchange is accomplished in
the pulmonary alveoli?

Gap-fill exercise

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The gas exchange ( of oxygen and
of carbon dioxide) the pulmonary
alveoli by simple diffusion
favour of the pressure gradient.

When oxygen partial pressure the
inhaled air higher than the
partial pressure of capillaries of the
the air diffuses the circulatory
system. the oxygen partial
in the air lower (a rare since
the blood reaches the alveoli
venous blood) the exits the
circulatory . The same is for
carbon dioxide.