Early Embryo Area Opaca Early Endoderm Early Mesoderm Epiblast Germinal Crescent Headfold Hypoblast Kohler's Sickle Primitive Streak Hensen's Node Ectoderm Diencephalon Pineal Gland Pituitary (Rudiment) Telencephalon Brainstem Nuclei Rhombomeres Isthmus/MHB Midbrain Neural Plate/Tube Spinal Cord Neural Crest Cranial PNS Cranial Ganglion Cranial Nerve Placcode Spinal Ganglia and Nerves 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 Midgut Liver Lung 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 Epicardium | Mesoderm (cont.) Gonad Renal Glomeruli Nephric Ducts Nephric Tubules Somatopleure Splanchnopleure Notochord Somites Dermatome Dermomyotome Myotome Sclerotome Multiple Origins Extraembryonic  Allantois Amnion Yolk Sack or Stalk Leg Leg AER Leg Ectoderm Leg Mesenchyme Leg Bones Leg Muscles Wing Wing AER Wing Ectoderm Wing Mesenchyme Wing Bones Wing Muscles Pharyngeal Arches and Clefts Tail Widespread Expression Ubiquitous Embryonic Ubiquitous Extraembryonic Unlabeled Embryonic Unlabeled Extraembryonic  
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