part of
part_of
part of
develops_from
develops from
develops from
ends during
starts during
embryonic structure
embryo
anatomical structure
whole organism
embryonic structure
XAO:0003042
embryonic structure (xenopus)
xenopus_anatomy
An anatomical structure that exists only before the organism is fully formed.
UBERON:0002050
NF stage 1
NF stage 44