The mesangium and glomerulonephritis.
D000818:Animals; D002196:Capillaries / Q000503:physiopathology; D005921:Glomerulonephritis / Q000473:pathology* / Q000503:physiopathology; D006801:Humans; D007678:Kidney Glomerulus / Q000098:blood supply / Q000473:pathology* / Q000503:physiopathology / Q000648:ultrastructure; D008854:Microscopy, Electron; D051381:Rats