title: Formation and patterning roles of the yolk syncytial layer.
mesh_terms: D000818:Animals; D019521:Body Patterning; D004707:Endoderm / Q000502:physiology; D015726:Giant Cells / Q000502:physiology*; D008648:Mesoderm / Q000502:physiology; D008954:Models, Biological; D013997:Time Factors; D015017:Yolk Sac / Q000378:metabolism*; D015027:Zebrafish / Q000196:embryology* / Q000502:physiology*