Which study focuses on the gas exchange and the mechanics of breathing?

• A. Respiratory Anatomy
• B. Cardiovascular Anatomy
• C. Life Span Development
• D. Respiratory Physiology

Answer: (D)

Gas exchange and the mechanics of breathing are questions of how the breathing system functions. Respiratory physiology specifically studies how air moves into and out of the lungs (ventilation), how the pressure changes created by respiratory muscles drive airflow, how the lungs expand and recoil (compliance), and how gases move between the alveoli and the blood (diffusion) to exchange oxygen and carbon dioxide. It also includes how breathing is regulated by nerves and chemicals. This functional focus sets it apart from respiratory anatomy, which is about the physical structures, or development-focused fields that look at changes across the lifespan. So the study that centers on gas exchange and breathing mechanics is respiratory physiology.