Differentiate between external respiration and internal respiration.
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Solution
In external respiration there is uptake of oxygen from the surrounding
environment (air or water medium) and elimination of carbon dioxide into
that medium. The exchange of gases takes place by diffusion across the
general body or respiratory surfaces. It is a purely physical process
and in this process no energy is produced.
In internal respiration
there are both oxidative and non-oxidative enzymatic reactions by which
energy is. made available to maintain the various vital activities. It
is a physio-chemical process and in this process energy is produced.