part of part of located in located in in taxon develops from develops from Aves primitive urogenital sinus urinary bladder galen:UrinaryBladder EMAPA:18321 NCIT:C12414 urocyst MAT:0000122 bladder GAID:0000004 MIAA:0000122 SCTID:302512001 EFO:0000290 UBERON:0001255 Wikipedia:Urinary_bladder Distensible musculomembranous organ situated in the anterior part of the pelvic cavity in which urine collects before excretion[MP]. MESH:D001743 CALOHA:TS-1090 XAO:0000154 MA:0000380 AAO:0000623 BTO:0001418 VHOG:0000740 EV:0100098 vesica EHDAA:9328 FMA:15900 EHDAA2:0000174 lower urinary tract viscus coelemic cavity lumen mesoderm-derived structure bladder organ