part of part of has quality has quality location of location of develops from develops from surrounded by surrounded by closed inner cell mass amniotic fluid amniotic cavity NCIT:C34102 VHOG:0000855 BTO:0000025 A closed space between the embryo and the amnion which contains the amniotic fluid and is formed by the fusion of the parts of the anterior and posterior amniotic folds. EHDAA2:0000119 SCTID:280366002 Wikipedia:Amniotic_cavity EMAPA:16079 FMA:63941 EHDAA:83 UBERON:0000301 amniotic fold proamniotic cavity extraembryonic cavity enclosed anatomical space entire extraembryonic component