Why Is Proper Ventilation Important for a Respiring Animal

Multiple Choice

Why is proper ventilation important for a respiring animal?

A) It directly increases gas exchange between the blood and cells.
B) It maintains proper O₂and CO₂levels on the external side of the respiratory surface so diffusion across it can be maintained.
C) It maintains blood circulation within the body of an animal.
D) It maintains proper O₂and CO₂levels on the internal side of the respiratory surface so diffusion across it can be maintained.
E) It directly maintains proper O₂and CO₂levels in tissues.