flow resistance of the lungs left in situ in the chest cavity opened after the sacrifice was measured at different levels of elastic pressure , and it was shown that daily 3-hr exposures to 1 ppm o3 for 30 consecutive days mainly produced increased resistance of more-central airways , while daily 6-hr exposures to 0.5 ppm o3 for 60 consecutive days mainly increased the resistance of peripheral airways .
C0024109
lungs
C0230139
chest cavity