Homo sapiens endocrine gland thymus https://cdn.humanatlas.io/digital-objects/ref-organ/thymus-female/v1.3/assets/3d-vh-f-thymus.glb https://cdn.humanatlas.io/digital-objects/ref-organ/thymus-male/v1.3/assets/3d-vh-m-thymus.glb https://upload.wikimedia.org/wikipedia/commons/c/cf/Illu_thymus.jpg EFO:0000860 BTO:0001374 UBERON:0002370 AAO:0010548 Wikipedia:Thymus FMA:9607 thymus organ XAO:0000163 VHOG:0000253 TAO:0001078 thymic NCIT:C12433 UMLS:C0040113 MIAA:0000080 EV:0100138 EMAPA:18768 ZFA:0001078 MESH:D013950 EHDAA:9119 EHDAA2:0002017 MAT:0000080 SCTID:118507000 check - a subtype of gland? not in GO. NCIT has thymus and thymus gland. EHDAA2 has ductless gland. Anatomical structure which originates as several paired thickenings on the dorsal side of the pharyngeal pouches and secretes thymosin.[AAO] Anatomical structure of largely lymphoid tissue that functions in cell-mediated immunity by being the site where T cells develop. MA:0000142 A thymus develops in all vertebrates from the endodermal epithelium of certain pharyngeal pouches and from the adjacent ectodermal epithelium. In fishes, all the pouches, or the first four, contribute to thymus formation, but in tetrapods, the number is more restricted. In mammals, only the third and fourth are involved, and the contribution of the third is by far the greater.[well established][VHOG] thymus gland GAID:464 CALOHA:TS-1043 endoderm-derived structure hemopoietic organ immune organ