exchange of gases between air and blood
transport/exchange of gases from blood to tissues
cellular (aerobic) respiration
using O₂ to produce ATP within cells
smaller airways without cartilage, but have smooth muscle
amount of air moved in 1 relaxed breath (500 mL in adults)
maximum amount exhaled after a maximum inhalation (about 4800 mL; 10x the tidal volume)
amount of air that always remains in the lungs (1200 mL)
total lung capacity
maximum amount of air lungs can hold (6 liters)
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