residual volume
Unexhalable air amount
Residual volume is the amount of air remaining in the lungs after a maximum exhalation—typically about 1.2 liters in adults.
This air cannot be expelled voluntarily; it keeps the alveoli from collapsing completely.
The term appears in pulmonary function testing, where abnormal residual volume can indicate conditions like emphysema or restrictive lung disease.
Lung airflow assessment
- vital capacityMaximum air lungs hold
- alveoliLung's gas-exchange chambers
- lung functionBreathing ability measurement
- gas exchangeTransfer of respiratory molecules
bronchioles · airways · diaphragm · thorax · pleura · ventilation · inspiration · expiration
Chronic obstructive pulmonary disease
- emphysemaDamaged lung air sacs
- asthmaChronic lung inflammation
- bronchitisInflamed airway disease
- hyperinflationExtreme rapid price escalation
dyspnea · breathlessness · wheezing · lung disease · fibrosis · pneumothorax · chronic bronchitis · pulmonary edema
Taking breath in
- exhalationBreathing out air
- breathingPulmonary gas exchange
- breathAir taken in
- diaphragmMuscle separating chest, abdomen
ventilation · gas exchange · oxygen · carbon dioxide · respiratory rate · deep breath · shallow breathing · respiratory muscles
spirometry
Lung airflow assessment
- vital capacityMaximum air lungs hold
- alveoliLung's gas-exchange chambers
- lung functionBreathing ability measurement
gas exchange · bronchioles · airways · diaphragm · thorax · pleura · ventilation · inspiration · expiration · obstructive
COPD
Chronic obstructive pulmonary disease
- emphysemaDamaged lung air sacs
- asthmaChronic lung inflammation
- bronchitisInflamed airway disease
hyperinflation · dyspnea · breathlessness · wheezing · lung disease · fibrosis · pneumothorax · chronic bronchitis · pulmonary edema
inhalation
Taking breath in
- exhalationBreathing out air
- breathingPulmonary gas exchange
- breathAir taken in
diaphragm · ventilation · gas exchange · oxygen · carbon dioxide · respiratory rate · deep breath · shallow breathing · respiratory muscles · intercostals
- breathingbreathing, inhalation, breath, exhalation, breathe
- Respirationbreathing, lungs, inhalation, inhaling, exhalation
- Spirometryspirometer, FEV1, vital capacity, peak flow, TLC
- Lung Measurementsvital capacity, lung capacity, FEV1, peak flow, spirometry
- lung testsspirometer, spirometry, lung function test, lung function, vital capacity
- Lungslungs, lung, bronchi, bronchus, alveoli