List of terms of lung size and activity

Following are terms that specify a type of lung size and/or activity. More specific definitions may be found in individual articles.
 * Eupnea – normal breathing
 * Apnea – absence of breathing
 * Bradypnea – decreased breathing rate
 * Dyspnea or shortness of breath – sensation of respiratory distress
 * Hyperaeration/Hyperinflation – increased lung volume
 * Hyperpnea – fast and deep breathing
 * Hyperventilation – increased breathing that causes CO2 loss
 * Hypopnea – slow and shallow breathing
 * Hypoventilation – decreased breathing that causes CO2 gain
 * Labored breathing – physical presentation of respiratory distress
 * Tachypnea – increased breathing rate
 * Orthopnea – Breathlessness in lying down position relieved by sitting up or standing
 * Platypnea – Breathlessness when seated or standing, relieved by lying flat
 * Trepopnea – Breathlessness when lying flat relieved by lying in a lateral position
 * Ponopnea – Painful breathing