part of
part_of
part of
luminal space of
yolk sac
anatomical cavity
yolk sac cavity
uberon
In mammals, the yolk sac cavity contains fluid rather than platelets
yolk sac space
EMAPA:16055
FMA:63942
UBERON:0005251
An anatomical cavity that is part of a yolk sac [Automatically generated definition].
yolk sac lumen
in EHDAA2, there are separate primary and secondary yolk sac cavities
cavity of yolk sac
VHOG:0000843
lumen of epithelial sac
extraembryonic cavity