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