part of part of develops_from reproductive system gonad AAO:0000213 Anatomical structure which produces gametes as well as certain sex hormones controlled by the pituitary gonadotropins.[AAO] BILA:0000123 BSA:0000079 BTO:0000534 EMAPA:16857 EMAPA:17383 Examination of different vertebrate species shows that the adult gonad is remarkably similar in its morphology across different phylogenetic classes. Surprisingly, however, the cellular and molecular programs employed to create similar organs are not evolutionarily conserved.[uncertain][VHOG] FBbt:00004858 FMA xref is a 'general anatomical term' FMA:18250 GAID:368 HAO:0000379 MA:0002420 MESH:D006066 OpenCyc:Mx4rwQvdiZwpEbGdrcN5Y29ycA Reproductive organ that produces and releases eggs (ovary) or sperm (testis). TAO:0000413 The part of the reproductive system that produces and releases eggs (ovary) or sperm (testis).[TAO] UBERON:0000991 UMLS:C0018067 VHOG:0000397 WBbt:0005175 XAO:0003146 ZFA:0000413 gonada gonadal gonads uberon reproductive organ gonad primordium