Given the task definition and input, reply with output. Given a scientific passage and an answer, generate a question for the given answer.

Passage: Respiration begins with ventilation, the process of moving air into and out of the lungs. Gas exchange in the lungs takes place in across the thin walls of pulmonary arteries in tiny air sacs called alveoli. Oxygenated blood is transported by the circulatory system from lungs to tissues throughout the body. Gas exchange between blood and body cells occurs across the walls of peripheral capillaries. Answer: ventilation
What is the process of moving air into and out of the lungs called?