On the diaphragm across fenestrae of capillary endothelium.
D000818:Animals; D002196:Capillaries / Q000166:cytology*; D002199:Capillary Permeability; D005615:Freezing; D006652:Histological Techniques; D007668:Kidney / Q000098:blood supply; D008854:Microscopy, Electron; D051381:Rats