O2 and CO2 exchange between systemic blood vessels and tissues
A. ventilation
B. transport
C. external respiration
D. internal respiration
Answer ; D) internal respiration.
Reason ; In the given statement the gases get exchanged in the internal body, that is within the blood vessels to the tissue found on the organs. Here there is no transport or exchange of gases take place with the outer world, therefore it would not be considered as external respiration process. Other options like transport and ventilation are not relevant to the given statement. therefore the above mentioned statement is the most appropriate one .
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