lungs

Alveoli

Terminal air sacs that constitute the gas exchange surface of the lungs. Allow for gas exchange with capillaries

Bronchi

Pair of breathing tubes that branch from the trachea into the lungs.

Diaphragm

A sheet of muscle that forms the bottom wall of the thoracic cavity in mammals; active in ventilating the lungs. Contracts (tightens) when inhaling, and relaxes when exhaling

Intercostal Muscle

Muscle located between the ribs. Contracts (tightens) when inhaling, and relaxes when exhaling

Pharmacology

The study of drugs, including their actions and effects in living body systems.

Residual Volume

The volume of air remaining in lungs after maximum exhalation. (1.5 liters)

Spirometer

An instrument for measuring the air entering and leaving the lungs.

Thoracic Cavity

The body cavity in mammals that houses the lungs and heart. It is surrounded in part by ribs and separated from the lower abdominal cavity by the diaphragm.

Tidal Volume

The volume of air breathed in and out without conscious effort.

Vital Capacity

The total volume of air that can be exhaled after maximal inhalation. (Normal = any number above 3 liters)

Total Lung Capacity

Total volume of air that can be exhaled + the residual volume (Normal = any number above 5 liters)