9 terms

Bio 111 Respiratory System

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