the filtering area per glomerulus , calculated as the area of the glomerular basement membrane facing both the endothelial and the epithelial cells , but not the mesangial cells , was not different in nx and in s rats at 20 days ( 3.0 +/- 0.3 vs 2.8 +/- 0.1 10 ( 4 ) microns 2 ) , but it was significantly greater in nx than in s rats at 60 days ( 23.3 +/- 3.7 vs 9.9 +/- 0.9 10 ( 4 ) microns 2 ) .
C0022663
glomerulus
C0599297
glomerular basement