part of part of contributes to morphology of mucosa uterine wall uterus endometrium Animals that have estrous cycles reabsorb the endometrium if conception does not occur during that cycle. Animals that have menstrual cycles shed the endometrium through menstruation instead BTO:0001422 CALOHA:TS-0276 EFO:0000980 EMAPA:29917 EV:0100115 FMA:17742 GAID:377 MA:0000390 MAT:0000319 MESH:D004717 MIAA:0000319 The maternal part of the placenta (of eutherian mammals) is the vascularized and glandular uterine lining, or endometrium.[well established][VHOG] The mucous membrane lining the uterus. [TFD][VHOG] UBERON:0001295 UMLS:C0014180 VHOG:0001285 endometrial in FMA this is subdivided into basal and outer the glandular mucous membrane lining of the uterine cavity that is hormonally responsive during the estrous/menstrual cycle and during pregnancy tunica mucosa (endometrium) tunica mucosa uteri uberon uterine endometrium uterine mucosa uterine mucous membrane reproductive system mucosa