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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

Aadjacent dorsal aortas (1), amnion attachment to ventral body wall (1), amnion attachment to ventral body wall (caudal part of head fold) (1), anterior interventricular sulcus (30), aorta (490), aortic bifurcation (27)
Ccaudal 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 6 (C-2) (1), caudal edge of dermatomyotome 7 (C-3) (1), caudal edge of dermatomyotome 9 (C-5) (1), caudal edge of median mandibular groove (1), caudal edge of midgut (1), 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 end of pharynx (1), caudal part of dermatomyotome 3 (O-3) (1), 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 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 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 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 tip of notochord (1), cephalic wall of hepatic antrum (2), cervical sinus (14), cloaca (36), closure area (1), common atrium (4), 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 coelomic cavity (1), conus cordis (10)
Ddermatomyotome 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 4-5 intersegmental region (1), dermatomyotome 5-6 interspace (1), diencephalon (D1) (8), diencephalon (D2) (12), 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)
Eedge 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), epipharyngeal placode 2 (7)
Ffloor of interatrial sulcus (1), floor plate of mesencephalon (M2) (1)
Hhemopoietic tissue (2), hepatic antrum (16), hepatic diverticulum (2), hepatic venous plexus (2), hindgut arterial plexus (1), hindgut artery (1)
Iinteratrial sulcus (4), intersegmental region (3), interventricular foramen (73), intraretinal space (optic vesicle cavity) (68)
Jjunction of allantois and cloaca (2), 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 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 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 right horn of sinus venosus and right postcardinal vein (2), junction of septum transversum and umbilical vesicle (2)
Lleft common iliac artery (38), left dorsal aorta (1), longitudinal section of roof plate (1), longitudinal section of surface ectoderm (1)
Mmedian mandibular groove (19), mesencephalon (M1) (29), mesencephalon (M2) (49), mesencoel (16), mesonephric duct (197), mesonephric vesicle(s) (49), mesothelium of peritoneal cavity (2)
Nnasal disc (olfactory placode) (29), neural tube wall (3), neuropore site (5), 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), otic pit (3), otic vesicle (17)
Ppharyngeal arch 1 mesenchyme (1), pharyngeal arch 3 (21), pharyngeal groove 2 (9), pharyngeal groove 3 (5), pharyngeal membrane 1 (5), pharyngeal membrane 2 (3), pharyngeal pouch 3 (13), pharyngeal pouch 4 (13), pharyngeal pouch 4 recess (1), pharynx (30), posterior interventricular sulcus (4), presumptive optic stalk (CN II) (1), presumptive upper limb bud (10), 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)
Rremnant of oropharyngeal membrane (5), rhombencoel (fourth ventricle) (265), right common iliac artery (26)
Sseptum primum (1), sinus venosus (89), 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 lumen (2), surface ectoderm at cephalic part of head (1)
Ttelencephalon medium (T) (5), tributary of left umbilical vein (1), truncus arteriosus (19)
Uultimopharyngeal pouch (14), umbilical venous plexus in umbilical vesicle wall (2)
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