part of part of surrounded by surrounded by surrounds surrounds contributes to morphology of composed primarily of uterine wall uterus smooth muscle tissue endometrium myometrium EFO:0001970 uterine smooth muscle tunica muscularis (myometrium) uterine myometrium NCIT:C12314 BTO:0000907 FMA:17743 Wikipedia:Myometrium MESH:D009215 The smooth muscle coat of the uterus, which forms the main mass of the organ and surrounds and supports the endometrium. VHOG:0001281 GAID:171 SCTID:279879004 CALOHA:TS-0652 UBERON:0001296 EMAPA:29923 EV:0100116 MA:0000391 serosa of uterus organ component layer reproductive structure layer of smooth muscle tissue