The measurement of gas trapped in the lungs at functional residual capacity and the effects of posture.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000388:Air; D000758:Anesthesia; D001827:Body Height; D001835:Body Weight; D005260:Female; D006371:Helium; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged; D009584:Nitrogen; D011187:Posture; D012119:Respiration; D013147:Spirometry; D014797:Vital Capacity
D006371:Helium; D009584:Nitrogen