name part_of_yolk_sac namespace http://cytomer.bioinf.med.uni-goettingen.de# parent extraembryonic_component child part_of_secondary_yolk_sac child extraembryonic_mesoderm_of_secondary_yolk_sac child part_of_primary_yolk_sac label [en] part of yolk sac label [de] Bestandteil des Dottersacks hasPart primordial_germ_cell