Figure 3: Embryo from Group I: Brain (B), future pituitary gland (P), tongue (T), mandibular prominence (M), nose (N), ventricle (V), atrium (A), pericardium (P), liver (L), interlobar zone of the liver (Iz), lung bud (Lb), somites (S), intestinal loops (Il), and the hindlimb bud (Hl). Embryo from Group II: Brain (B), fourth ventricle (F), pharyngeal pouch (Pp), vomeronasal organ (Vn), oral cavity (Oc), ventricular wall (Vw), trabeculae of the ventricular wall (T), atrium (A), diaphragm (D), liver (L), lung (Lu), and stomach (St). Embryo from Group III: Brain (B), eye (E), rib (R), sternum (St), diaphragm (D), forelimb (Fl), and hindlimb (Hl).