Ultrastructure of human yolk sac: endoderm, mesenchyme, tubules and mesothelium.
D002467:Cell Nucleus; D003239:Connective Tissue Cells; D003593:Cytoplasm; D004707:Endoderm / Q000166:cytology; D004721:Endoplasmic Reticulum; D005321:Extraembryonic Membranes / Q000166:cytology*; D005260:Female; D006056:Golgi Apparatus; D006651:Histocytochemistry; D006801:Humans; D008648:Mesoderm / Q000166:cytology; D008854:Microscopy, Electron; D008928:Mitochondria; D011247:Pregnancy