title: Ontogeny of the haemopoietic system: yolk sac origin of in vivo and in vitro colony forming cells in the developing mouse embryo.
mesh_terms: D000818:Animals; D005321:Extraembryonic Membranes; D005260:Female; D006410:Hematopoiesis; D006413:Hematopoietic System / Q000196:embryology*; D007962:Leukocytes; D008099:Liver / Q000196:embryology; D008264:Macrophages; D051379:Mice; D009924:Organ Culture Techniques; D011247:Pregnancy; D013154:Spleen / Q000166:cytology / Q000196:embryology