surrounded by surrounded by blastocele blastocoelic cavity blastocoele SCTID:361455006 XAO:0000294 blastocyst cavity Wikipedia:Blastocele VHOG:0000811 UBERON:0000090 segmentation cavity EHDAA2:0000175 EMAPA:16044 cleavage cavity EHDAA:50 Fluid-filled central region of a blastocyst. blastocoel AAO:0010433 blastocelic cavity FMA:293131 epiblast (generic) anatomical cavity