Answer:
Ventilation is the proper technical word for the process of air entering and exiting the lungs. Therefore, the correct option is B.
Step-by-step explanation:
The exchange of air between the lungs and the surrounding environment, which includes both inhalation and exhalation, is referred to as ventilation. Air is pulled into the lungs during inhalation and ejected during expiration.
While it is a mechanism present in various biological systems, countercurrent exchange has nothing to do with breathing particularly. Although the terms inspiration and inhalation are sometimes used synonymously, inspiration does not fully describe the process of drawing air into and out of the lungs; therefore, ventilation is the most appropriate term in this instance.
Therefore, the correct option is B.