The glandular mucous membrane lining of the uterine cavity that is hormonally responsive during the estrous/menstrual cycle and during pregnancy.
Comment:
[homology-note] "The maternal part of the placenta (of eutherian mammals) is the vascularized and glandular uterine lining, or endometrium.[well established][VHOG]" xsd:string {date_retrieved="2012-09-17", external_class="VHOG:0001285", ontology="VHOG", source="ISBN:978-0030223693 Liem KF, Bemis WE, Walker WF, Grande L, Functional Anatomy of the Vertebrates: An Evolutionary Perspective (2001) p.144", source="http://bgee.unil.ch/"}; [taxon-note] "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"