located in develops from kidney pronephros pronephric kidney Wikipedia:Pronephros XAO:0002000 TAO:0000151 EHDAA:1017 pronephron embryonic kidney EHDAA2:0001570 FMA:72170 EFO:0000927 NCIT:C34280 VHOG:0000037 BTO:0001541 EMAPA:16579 MAT:0000117 SCTID:308804007 ZFA:0000151 In mammals, the pronephros is the first of the three embryonic kidneys to be established and exists only transiently. In lower vertebrates such as fish and amphibia, the pronephros is the fully functional embryonic kidney and is indispensible for larval life[GO]. UBERON:0005794 MIAA:0000117 archinephron Once the more complex mesonephros forms the pronephros undergoes apoptosis in amphibians. In fishes the nephron degenerates but the organ remains and becomes a component of the immune system[Wikipedia:Pronephros]. // TODO - check developmental relationships. Note that we previously include the ZFA/XAO terms under the more specific 'pronephric kidney', but these are now merged. TODO GCI: relationship: capable_of GO:0030104 AAO:0011089 intraembryonic coelom mesoderm-derived structure developing anatomical structure pronephric mesoderm rostral part of nephrogenic cord