− | [[Image:avrenalanattri.jpg|right|thumb|300px|<small><center>A schematic showing the vascularisation of the avian kidneys, specifically the renal portal structure. <sub>N.B. the renal arteries have been excluded</sub></center></small>]] | + | [[Image:avrenalanattri.jpg|right|thumb|300px|<small><center>A schematic showing the vascularisation of the avian kidneys, specifically the renal portal structure. N.B. the renal arteries have been excluded</center></small>]] |