Source: Respiratory System; Creative Commons: http://en.wikipedia.org/wiki/File:Respiratory_system.svg
The events that occur during one breath; inhalation + exhalation = 1 respiratory cycle.
The events that occur to drive air flow into the lungs; when the diaphragm contracts to expand the thoracic cage and decrease the pressure inside of the chest.
The events that occur to drive air flow out of the lungs; when the diaphragm relaxes and the thoracic cage collapses putting a positive pressure on the lungs driving air out.
The volume of air we breathe in per breath; the average tidal volume is 500 mL/breath.
The maximum amount of air you move during one breathing cycle.