What is the amount of air moved into or out of the lungs with each single breath at rest called?

What is the amount of air moved into or out of the lungs with each single breath at rest called?

• A. Tidal Volume
• B. Inspiratory Reserve Volume
• C. Residual Volume
• D. Vital Capacity

Answer: (A)

Tidal volume is the amount of air moved into or out of the lungs with each normal breath at rest. In a healthy adult, this is about 500 mL per breath (roughly 6–8 mL per kilogram of body weight). This differs from inspiratory reserve volume, the extra air you can inhale beyond a regular inhalation; residual volume, the air remaining in the lungs after a full exhale; and vital capacity, the total amount of air you can exhale after a maximal inhalation (tidal volume plus the reserve volumes).

Tidal volume is the amount of air moved into or out of the lungs with each normal breath at rest. In a healthy adult, this is about 500 mL per breath (roughly 6–8 mL per kilogram of body weight). This differs from inspiratory reserve volume, the extra air you can inhale beyond a regular inhalation; residual volume, the air remaining in the lungs after a full exhale; and vital capacity, the total amount of air you can exhale after a maximal inhalation (tidal volume plus the reserve volumes).