on postoperative days 1 , 4 , 6 , 9 , 12 , 18 , and 30 , the lungs of 5 animals were fixed by intratracheal instillation of glutaraldehyde , their volumes measured by water displacement , and the lung tissue processed for quantitative light ( lm ) and electron microscopic ( em ) investigations .
C0024109
lungs
C0819757
lung tissue