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Carnegie Stage 2 3-1 3-2 4 5a-1 5a-2 5b 5c 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 All

Carnegie Stage 12

Aadenohypophysial pouch (22), adjacent dorsal aortas (1), alar plate(s) (197), allantois (143), amnion (104), amnion attachment (125), amnion attachment to ventral body wall (1), amnion attachment to ventral body wall (caudal part of head fold) (1), amniotic cavity (214), anterior interventricular sulcus (30), aorta (490), aortic arch 1 (38), aortic arch 2 (16), aortic bifurcation (27), aortic sac (29), artifact separation(s) (192), artifact space(s) (94), atrioventricular canal (5)
Bbasal plate (179), blood vessel(s) (9)
Ccardiac jelly (33), caudal edge of caudal eminence (5), caudal edge of cloaca (4), caudal edge of cloacal lumen (1), caudal edge of dermatomyotome 10 (C-6) (1), caudal edge of dermatomyotome 11 (C-7) (1), caudal edge of dermatomyotome 12 (C-8) (1), caudal edge of dermatomyotome 13 (T-1) (1), caudal edge of dermatomyotome 14 (T-2) (1), caudal edge of dermatomyotome 16 (T-4) (1), caudal edge of dermatomyotome 2 (O-2) (2), caudal edge of dermatomyotome 6 (C-2) (1), caudal edge of dermatomyotome 7 (C-3) (1), caudal edge of dermatomyotome 8 (C-4) (2), caudal edge of dermatomyotome 9 (C-5) (1), caudal edge of median mandibular groove (1), caudal edge of midgut (1), caudal edge of notochord (2), caudal edge of otic vesicle (4), caudal edge of pericardial cavity (7), caudal edge of peritoneal cavity (10), caudal edge of pharyngeal pouch 1 (2), caudal edge of presumptive upper limb bud (1), caudal edge of respiratory primordium (2), caudal edge of septum transversum (1), caudal edge of somite 17 (T-5) (1), caudal edge of trigeminal neural crest (CN V) (1), caudal edge of ventricles (1), caudal eminence (109), caudal end of pharynx (1), caudal intestinal portal (6), caudal neuropore (32), caudal part of dermatomyotome 3 (O-3) (1), caudal part of notochord (2), caudal part of oropharyngeal membrane (1), caudal part of pericardial cavity (3), caudal part of pericardioperitoneal canal (pleural cavity) (2), caudal part of peritoneal cavity (1), caudal part of upper limb bud (1), caudal part of ventricles (2), caudal wall of cloaca (1), caudal wall of otic vesicle (1), cephalic edge of caudal neuropore (3), cephalic edge of dermatomyotome 1 (O-1) (4), cephalic edge of dermatomyotome 12 (C-8) (1), cephalic edge of dermatomyotome 13 (T-1) (1), cephalic edge of dermatomyotome 14 (T-2) (1), cephalic edge of dermatomyotome 16 (T-4) (1), cephalic edge of dermatomyotome 3 (O-3) (2), cephalic edge of dorsal aorta (2), cephalic edge of head (1), cephalic edge of left atrium (6), cephalic edge of mesencephalon (M2) (1), cephalic edge of notochord (1), cephalic edge of otic vesicle (4), cephalic edge of pericardial sac (1), cephalic edge of pharynx lumen (1), cephalic edge of presumptive upper limb bud (1), cephalic edge of primary interatrial septum (septum primum) (1), cephalic edge of rhombencephalon (Rh. 1) (1), cephalic edge of right atrium (6), cephalic edge of septum tranversum (3), cephalic edge of telencephalon medium (T) (1), cephalic edge of thyroid diverticulum (1), cephalic end of laryngotracheal groove (1), cephalic extent of mesonephric vesicles (2), cephalic intestinal portal (6), cephalic part of dermatomyotome 4 (O-4) (1), cephalic part of dermatomyotome 5 (C-1) (1), cephalic part of head (2), cephalic part of pericardial cavity (1), cephalic parts of conus cordis (2), cephalic tip of notochord (1), cephalic wall of hepatic antrum (2), cervical sinus (14), chiasmatic plate (D1) (8), cloaca (36), cloacal membrane (24), closure area (1), common atrium (4), common umbilical artery (15), common ventricle (8), communication between dorsal aortas (1), communication between intraretinal space (optic vesicle cavity) and prosencoel (third ventricle) (1), communication between peritoneal cavity and extra-embryonic coelom (16), communication between peritoneal cavity and extra-embryonic coelomic cavity (1), conus cordis (10)
Ddermatomyotome 1 (O-1) (18), dermatomyotome 10 (C-6) (14), dermatomyotome 11 (C-7) (23), dermatomyotome 11-12 intersegmental region (1), dermatomyotome 12 (C-8) (14), dermatomyotome 13 (T-1) (13), dermatomyotome 14 (T-2) (16), dermatomyotome 15 (T-3) (19), dermatomyotome 15-16 intersegmental region (1), dermatomyotome 16 (T-4) (20), dermatomyotome 16 - somite 17 intersegmental region (1), dermatomyotome 2 (O-2) (23), dermatomyotome 3 (O-3) (15), dermatomyotome 4 (O-4) (15), dermatomyotome 4-5 intersegmental region (1), dermatomyotome 5 (C-1) (31), dermatomyotome 5-6 interspace (1), dermatomyotome 6 (C-2) (29), dermatomyotome 7 (C-3) (24), dermatomyotome 8 (C-4) (17), dermatomyotome 9 (C-5) (20), diencephalon (D1) (8), diencephalon (D2) (12), dorsal aorta (327), dorsal edge of somite 18 (T-6) (1), dorsal edge of somite 19 (T-7) (2), dorsal edge of somite 20 (T-8) (1), dorsal edge of somite 21 (T-9) (1), dorsal edge of somite 23 (T-11) (1), dorsal intersegmental artery (16)
Eectoderm (17), ectodermal ring (17), edge of aortic arch 3 (1), edge of intermediate mesenchyme (1), edge of intraretinal space (optic vesicle cavity) (4), edge of neural tube lumen (1), edge of optic vesicle (2), endocardium (30), endoderm (83), epimyocardium (34), epipharyngeal placode 2 (7), extra-embryonic coelom (63)
Ffacio-vestibulocochlear neural crest (CN VII and CN VIII) (17), floor of interatrial sulcus (1), floor plate (103), floor plate of mesencephalon (M2) (1), foregut (26), fusing neural folds (3)
Ggastrulation (primitive) streak (51), glossopharyngeal neural crest (CN IX) (6)
Hhead mesenchyme (224), hemopoietic tissue (2), hepatic antrum (16), hepatic diverticulum (2), hepatic venous plexus (2), hindgut (125), hindgut arterial plexus (1), hindgut artery (1)
Iinteratrial foramen (primum) (8), interatrial sulcus (4), intermediate mesenchyme (52), internal carotid artery (112), intersegmental region (3), interventricular foramen (73), intraretinal space (optic vesicle cavity) (68)
Jjunction of allantois and cloaca (2), junction of amnion and umbilical vesicle (3), junction of amnion and ventral body wall (caudal part of head) (1), junction of aorta and left common iliac artery (2), junction of aorta and right common iliac artery (2), junction of aortic arch 1 and dorsal aorta (3), junction of aortic arch 2 and dorsal aorta (3), junction of aortic sac and truncus arteriosus (2), junction of cloaca and hindgut (2), junction of cloaca and mesonephric duct (6), junction of common atrium and sinus venosus (2), junction of conus cordis and right ventricle (2), junction of conus cordis and truncus arteriosus (2), junction of dorsal aortas (5), junction of foregut and midgut (2), junction of hepatic and umbilical veins (1), junction of left horn of sinus venosus and left umbilical vein (3), junction of left sinus horn and postcardinal vein (1), junction of left umbilical vein (1), junction of midgut and umbilical vesicle wall (1), junction of notochord and pharyngeal wall (1), junction of precardinal and primary head veins (8), junction of rhombencephalon and spinal cord (4), junction of right horn of sinus venosus and right postcardinal vein (2), junction of septum transversum and umbilical vesicle (2), junction of umbilical arteries (3)
Llaryngotracheal groove (6), left atrium (172), left common iliac artery (38), left dorsal aorta (1), left horn of sinus venosus (40), left umbilical artery (248), left umbilical vein (131), left ventricle (148), left vitelline (omphalomesenteric) vein (25), longitudinal section of roof plate (1), longitudinal section of surface ectoderm (1), lumen of neural tube (22)
Mmedian mandibular groove (19), mesencephalon (M1) (29), mesencephalon (M2) (49), mesenchyme (15), mesencoel (16), mesocardium (34), mesoderm (32), mesonephric duct (197), mesonephric vesicle(s) (49), mesothelium of peritoneal cavity (2), mesothelium of umbilical vesicle (10), midgut (137)
Nnasal disc (olfactory placode) (29), neural fold (50), neural plate (42), neural tube (95), neural tube wall (3), neuropore site (5), notochord (501), nucleated red blood cells (3)
Oopen otic vesicle (1), optic neural crest (D1) (1), optic vesicle (D1) (7), origin of aortic arch 2 (1), origin of dorsal intersegmental artery (6), origin of internal carotid artery (1), origin of vitelline (omphalomesenteric) artery (3), oropharyngeal membrane (6), otic pit (3), otic vesicle (17)
Pparaxial mesoderm (54), pericardial cavity (266), pericardial sac (38), pericardioperitoneal canal (pleural cavity) (29), perinotochordal lamina (14), peritoneal cavity (251), pharyngeal arch 1 (18), pharyngeal arch 1 mesenchyme (1), pharyngeal arch 2 (36), pharyngeal arch 3 (21), pharyngeal groove 1 (50), pharyngeal groove 2 (9), pharyngeal groove 3 (5), pharyngeal membrane (2), pharyngeal membrane 1 (5), pharyngeal membrane 2 (3), pharyngeal pouch 1 (46), pharyngeal pouch 2 (28), pharyngeal pouch 3 (13), pharyngeal pouch 4 (13), pharyngeal pouch 4 recess (1), pharynx (30), postcardinal vein (224), posterior interventricular sulcus (4), precardinal vein (144), presumptive optic stalk (CN II) (1), presumptive upper limb bud (10), primary head vein (62), primary head vein tributary (1), primary interatrial septum (septum primum) (47), primary umbilical vesicle stalk (2), primordial genital ridge (3), primordial omental bursa (10), prosencoel (third ventricle) (54)
Rregion of mesencephalic (cephalic) flexure (30), remnant of oropharyngeal membrane (5), respiratory primordium (16), rhombencephalon (Rh. 1) (14), rhombencephalon (Rh. 2) (15), rhombencephalon (Rh. 3) (7), rhombencephalon (Rh. 4) (12), rhombencephalon (Rh. 5) (16), rhombencephalon (Rh. 6) (9), rhombencephalon (Rh. 7) (4), rhombencephalon (Rh. D) (28), rhombencoel (fourth ventricle) (265), right atrium (192), right common iliac artery (26), right horn of sinus venosus (18), right umbilical artery (217), right umbilical vein (125), right ventricle (100), right vitelline (omphalomesenteric) vein (17), roof plate (249)
Ssclerotome (117), separation artifact (10), septum primum (1), septum transversum (69), sinus venosus (89), somatopleure (14), somatopleuric mesoderm (18), somite 17 (T-5) (3), somite 17-18 intersegmental space (1), somite 18 (T-6) (3), somite 19 (T-7) (3), somite 20 (T-8) (4), somite 21 (T-9) (4), somite 22 (T-10) (4), somite 23 (T-11) (1), somitocoel (10), specialized coelomic wall (18), spinal cord (22), spinal part of neural tube (19), spinal part of neural tube lumen (2), splanchnopleure (8), splanchnopleuric mesoderm (21), stomodeum (15), sulcus limitans (276), surface ectoderm (351), surface ectoderm at cephalic part of head (1)
Ttangentially cut surface ectoderm (8), telencephalon medium (T) (5), thyroid diverticulum (6), tributary of left umbilical vein (1), trigeminal neural crest (CN V) (12), truncus arteriosus (19)
Uultimopharyngeal pouch (14), umbilical venous plexus in umbilical vesicle wall (2), umbilical vesicle cavity (127), umbilical vesicle wall (73)
Vvascular plexus (124), venous plexus(es) (47), ventral body wall (9), ventral edge of somite 17 (T-5) (1), ventral edge of somite 18 (T-6) (1), ventral edge of somite 19 (T-7) (1), ventral edge of somite 20 (T-8) (1), ventral edge of somite 21 (T-9) (1), ventral edge of somite 22 (T-10) (1), ventral edge of somite 23 (T-11) (1)
Wwall separating right dorsal aorta (1)

Carnegie Stage 2 3-1 3-2 4 5a-1 5a-2 5b 5c 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 All