has part has_part develops from existence starts with existence ends with animal zygote anatomical structure embryo stage embryonic structure conceptus uberon embryo plus adnexa The embryo and its adnexa (appendages or adjunct parts) or associated membranes (i.e. the products of conception) The conceptus includes all structures that develop from the zygote, both embryonic and extraembryonic. It includes the embryo as well as the embryonic part of the placenta and its associated membranes - amnion, chorion (gestational sac), and yolk sac[WP]. BTO:0003834 Wikipedia:Conceptus NCIT:C34131 UBERON:0004716 EMAPA:36040 EHDAA2:0003235 EHDAA2:0000001 AEO:0000194 entire extraembryonic component