Answer:
The respiratory system inhale oxygen and exhale carbon dioxide.Option A is correct.
Step-by-step explanation:
The respiratory system functions by inhaling oxygen and exhaling carbon dioxide. During inhalation, air containing oxygen is drawn into the lungs, where oxygen is then transferred into the bloodstream. Simultaneously, carbon dioxide, a waste product of cellular metabolism, is expelled from the body during the exhalation process.
Inhaling oxygen is a vital step in the process of respiration, as oxygen is necessary for the production of energy through cellular respiration. Exhaling removes carbon dioxide, preventing its accumulation, which could lead to respiratory acidosis. The intricate coordination of inhalation and exhalation ensures the exchange of gases needed for cellular function.
Option A is correct.