What is the process of air moving in and out of the chest called?

Study for the NOLS Wilderness Emergency Medical Technician (WEMT) Test with flashcards and multiple-choice questions, each offering hints and explanations. Prepare for your exam confidently!

The process referred to in the question—air moving in and out of the chest—is known as ventilation. Ventilation encompasses the mechanical aspects of breathing, which involves inhalation (the intake of air into the lungs) and exhalation (the expulsion of air out of the lungs).

Understanding ventilation is crucial because it highlights the importance of the respiratory muscles and the mechanics of the thoracic cavity in facilitating the exchange of air, which is vital for oxygenation of blood and removal of carbon dioxide. This process is distinct from respiration, which involves the biochemical exchange of gases at the cellular level, and diffusion, which specifically refers to the movement of molecules from an area of higher concentration to an area of lower concentration. Hence, ventilation appropriately captures the entire cycle of air movement in the lungs.

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