Early Embryo Area Opaca Early Endoderm Early Mesoderm Epiblast Germinal Crescent Hypoblast Kohler's Sickle Primitive Streak Hensen's Node Ectoderm Neural Crest Neural Ectoderm Diencephalon Pineal Gland Pituitary (Rudiment) Telencephalon Brainstem Nuclei Cranial Ganglia Rhombomeres Isthmus/MHB Midbrain Neural Plate/Tube Spinal Cord Spinal Ganglia Ear/Otic Placcode Eye Lens Retina Nasal Placcode/Nerve Surface Ectoderm Feathers/Scutae | Endoderm Anterior Intestinal Portal Foregut Duodenum Esophagus Gizzard Oral Pharynx Pharynx Stomach Liver Lungs Pancreas Thyroid Mesoderm Head Mesenchyme Face Mesenchyme Head Process Trunk Mesenchyme Blood Blood Islands Blood Vessels Arteries Aorta Veins Cardinal Veins Heart Atria Endocardium Heart Tube Myocardium Outflow Tract Sinus Venosus Valves Ventricles Proepicardium/PE cells Epicardium | Mesoderm (cont.) Gonad Renal Glomeruli Nephric Ducts Nephric Tubules Somatopleure Splanchnopleure Notochord Somites Dermatome Myotome Sclerotome Multiple Origins Extraembryonic  Allantois Amnion Yolk Sack or Stalk Leg Leg AER Leg Ectoderm Leg Mesenchyme Leg Bones Leg Muscles Limb Mesoderm Wing Wing AER Wing Ectoderm Wing Mesenchyme Wing Bones Wing Muscles Pharyngeal Arches and Clefts Tail Widespread Expression Other Ubiquitous Embryonic Ubiquitous Extraembryonic Unlabeled Embryonic Unlabeled Extraembryonic 
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