title: Hemopoiesis and blood vessels in human yolk sac. An electron microscopic study.
mesh_terms: D001792:Blood Platelets / Q000166:cytology / Q000502:physiology; D001808:Blood Vessels / Q000166:cytology*; D002196:Capillaries / Q000166:cytology; D002467:Cell Nucleus; D004912:Erythrocytes / Q000166:cytology / Q000502:physiology; D005321:Extraembryonic Membranes / Q000098:blood supply* / Q000166:cytology / Q000502:physiology; D005865:Gestational Age; D006056:Golgi Apparatus; D006410:Hematopoiesis; D006454:Hemoglobins / Q000096:biosynthesis; D006801:Humans; D007962:Leukocytes / Q000166:cytology / Q000502:physiology; D008214:Lymphocytes / Q000166:cytology; D008533:Megakaryocytes / Q000166:cytology; D008854:Microscopy, Electron; D008928:Mitochondria; D010873:Pinocytosis; D012156:Reticulocytes / Q000166:cytology
chemical_list: D006454:Hemoglobins