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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 16

Aabdominal wall mesenchyme (7), abducens nerve (CN VI) (24), afferent hepatic vein (34), alar plate of metencephalon (cerebellum) (39), anal fold (7), anal pit (15), aortic arch 6 (9), aortic vestibule of left ventricle (6), aortic vestibule of right ventricle (1), aorticopulmonary septum (10), apex of urogenital sinus (1), archipallium (7), arm (1), arm region of upper limb (1), ascending aorta (51), atrioventricular sulcus (12), axial artery (5)
Bbare area of liver (5), basis pedunculi of pons region (metencephalon) (17), blastema of rib 1 (3), blastema of rib 10 (8), blastema of rib 11 (5), blastema of rib 2 (4), blastema of rib 3 (6), blastema of rib 4 (6), blastema of rib 5 (6), blastema of rib 6 (7), blastema of rib 7 (8), blastema of rib 8 (7), blastema of rib 9 (7), blood cells (2), blood cells in umbilical coelom (2), body of stomach (16), body segment (4), brachial artery (17), branch of posterior cerebral artery (1)
CC-3 ventral primary ramus (3), C-5 ventral primary ramus (9), C-6 ventral primary ramus (4), C-7 ventral primary ramus (6), C-8 ventral primary ramus (2), cardiac prominence (2), carotid duct (3), caudal edge of adenohypophysial pouch (1), caudal edge of C-3 spinal ganglion (1), caudal edge of cochlear duct (3), caudal edge of cochlear part of otic vesicle (1), caudal edge of gall bladder (3), caudal edge of hand plate (2), caudal edge of pharyngeal arch 4 (1), caudal edge of pharyngeal pouch 2 (1), caudal edge of stomach (5), caudal end of gonadal ridge (2), caudal part of umbilical coelom (1), cecum (7), cecum endoderm (1), celiac plexus (5), central canal of myelencephalon (7), cephalic edge of accessory nerve (CN XI) (1), cephalic edge of C-5 spinal ganglion (2), cephalic edge of C-6 spinal ganglion (1), cephalic edge of C-7 spinal ganglion (1), cephalic edge of diencephalon (2), cephalic edge of gall bladder (6), cephalic edge of lateral rectus premuscle mass (1), cephalic edge of lesser sac (omental bursa) (1), cephalic edge of mesonephros (6), cephalic edge of sulcus limitans (1), cephalic edge of T-4 spinal ganglion (1), cephalic edge of upper limb (5), cephalic edge of vagus nerve (CN X) (1), cephalic end of mesonephric duct (1), cephalic end of sympathetic trunk (1), cephalic part of C-2 spinal ganglion (1), cephalic part of occipital myotome (1), cephalic part of tongue (1), cephalic tip of endolymphatic duct (1), cerebral peduncle (21), cerebral vesicle (neopallium) (3), cervical fold (1), cervical myotome (4), closing membrane between pharyngeal groove 2 and pharyngeal pouch 2 (1), coccygeal mesenchyme (1), coccygeal mesoderm (3), cochlear ganglion (CN VIII) (4), cochlear part of vestibulocochlear ganglion (CN VIII) (1), communicating ramus (17), condensation around optic cup (2), continuity of caudal and cephalic parts of gonadal ridge (2), continuity of common iliac and left umbilical arteries (1), continuity of floor plate (1), conus cordis (proximal outflow tract) (5), cornu Ammonis (5), cystic duct (23)
Ddeep lens epithelium (1), depression artifact (5), distal limb of herniated midgut (70), distal part of hand plate (1), dorsal fasciculus (44), dorsal intersegmental vein (1), dorsal mesentery mesoderm (1), dorsal mesentery of herniated midgut (1), dorsal mesentery of midgut (1), dorsal part of mesencephalon (M1) (1), dorsal primary ramus (9), dorsal ramus (1), dorsal ramus of C-4 spinal nerve (1), dorsal sulcus (14), duodenum (endoderm) (1)
Eedge of alar plate of metencephalon (1), edge of alar plate of myelencephalon (5), edge of blastema of rib 12 (1), edge of caudal part of hindgut (1), edge of cerebral vesicle (telencephalon) (4), edge of dorsal mesentery (1), edge of genital tubercle (1), edge of herniated midgut mesenchyme (2), edge of infolded roof plate (artifact) (1), edge of isthmus of rhombencephalon (2), edge of junction of mesencoel and rhombencoel (fourth ventricle) (1), edge of lateral lingual swelling of tongue (1), edge of lateral ventricle (15), edge of left atrioventricular canal (1), edge of left horn of sinus venosus (2), edge of left lobe of liver (4), edge of lower limb (4), edge of lower secondary bronchus bud (2), edge of medial thigh (1), edge of median mandibular groove (1), edge of mesencephalon (4), edge of mesencoel (cerebral aqueduct) (2), edge of mesentery of herniated midgut (1), edge of mesonephric duct (2), edge of mesonephros (1), edge of metanephrogenic blastema (2), edge of middle secondary bronchus bud (1), edge of nasal disc (olfactory placode) (1), edge of nasal sac epithelium (1), edge of neural layer of retina (2), edge of notochord (1), edge of optic chiasma (chiasmatic plate) (1), edge of oronasal cavity (2), edge of pericardial cavity (6), edge of pineal bud (1), edge of primordial pleural cavity (1), edge of proximal limb of herniated midgut (2), edge of pulmogenic coat (2), edge of right atrioventricular canal (1), edge of right lobe of liver (2), edge of sinus venosus (1), edge of third ventricle (4), edge of truncus arteriosus (1), edge of tuberculum impar (1), edge of umbilical vein (5), edge of upper limb (5), edge of upper secondary bronchus bud (3), efferent hepatic veins (23), epaxial muscle mass (2), epiglottis (12), epithelial lamina of larynx (2), esophageal condensation (4), esophagus endoderm (23), external space (6), extra-ocular premuscle mass (5)
Ffemoral artery (13), femoral vessels (1), forearm (7), front part of tongue (1), fundus of stomach (16), fused atrioventricular endocardial cushions (7), fusion point of atrioventricular endocardial cushions (1)
Ggall bladder (26), gluteal mesoderm (2), gluteal region (4), greater curvature of stomach (14), gyrus dentatus (5)
Hhand plate of upper limb (1), heart prominence (29), hepatic part of inferior vena cava (3), hepatic portal vein (50), hepatic prominence (1), herniated midgut (3), herniated midgut mesenchyme (2), horn of aortic sac (4), horn of urogenital sinus (4), hyaloid vessel(s) (8), hyaloid vessels in optic cup cavity (1)
Iincisure of stomach (1), infolded roof plate (3), infolded roof plate (artifact) (1), infrahyoid premuscle mass (4), infundibular recess (5), infundibulum of right ventricle (23), interganglion region (5), intermaxillary segment (4), intersubcardinal anastomosis (1)
Jjunction of abdominal wall and umbilical cord (3), junction of alar plate and L-3 dorsal root (1), junction of anterior dural venous plexus and primary head vein (1), junction of aortic arch 3 and internal carotid artery (1), junction of aortic arch 4 and carotid duct (1), junction of aortic arches 4 and 6 and horn of aortic sac (1), junction of aortic sac and ascending aorta (1), junction of caudal eminence and primordial perineum (1), junction of central canal and rhombencoel (fourth ventricle) (1), junction of common cardinal vein and right sinus horn (1), junction of common hepatic and cystic ducts (3), junction of diencephalon and telencephalon (1), junction of dorsal sulcus and sulcus limitans (1), junction of ductus venosus and umbilical vein (6), junction of esophagus and pharynx (1), junction of hindgut and rectum (3), junction of infundibulum and trabecular part of right ventricle (1), junction of internal carotid and posterior communicating arteries (5), junction of intraretinal space (optic vesicle cavity) and optic stalk lumen (CN II) (1), junction of left common cardinal vein and left sinus horn (1), junction of maxillary and primary head veins (1), junction of pelvis and thigh (1), junction of postcardinal vein and right common cardinal vein (1), junction of precardinal and subclavian veins (3), junction of rectum and urogenital sinus (1), junction of two parts of rhombencoel (fourth ventricle) (1), junction of vertebral arteries (4), junction ventrally of diencephalon and mesencephalon (2)
LL-1 spinal nerve (16), L-1 ventral primary ramus (7), L-1 ventral root (6), L-2 dorsal root (3), L-2 myotome (1), L-2 spinal nerve (18), L-2 ventral primary ramus (4), L-2 ventral root (4), L-3 dorsal root (4), L-3 spinal nerve (24), L-3 ventral primary ramus (4), L-3 ventral root (7), L-4 myotome (1), L-4 spinal nerve (23), L-4 ventral root (5), L-5 spinal nerve (18), L-5 ventral root (7), labioscrotal swelling (20), lateral atrioventricular endocardial cushion (1), lateral coelomic bay (3), lateral part of thyroid gland (1), lateral rectus premuscle mass (2), left atrial wall (1), left hepatic duct (1), leg (6), lesser curvature of stomach (14), liver prominence (32), lower secondary bronchus bud (9), lower trunk of brachial plexus (C-8, T-1) (8), lumbar plexus (13), lumbosacral plexus (11), lumen of nasal sac (8), lung, left (1), lung, right (5)
Mmamillary region of diencephalon (1), mammary ridge (7), marginal ridge (42), marginal zone of diencephalon (1), marginal zone of retina (2), maxillary vein (20), medial coelomic bay (4), medial eminence (3), medial thigh (2), median nerve (22), median sulcus (53), median sulcus in floor of rhombencoel (fourth ventricle) (6), median sulcus in floor of third ventricle (1), mesencephalic artery (7), mesenchymal condensation around hindgut (10), mesenchymal condensation around stomach endoderm (1), mesenchymal condensation in midgut mesentery (1), mesenchymal condensation of epiglottis (1), mesenchyme in dorsal mesogastrium (1), mesenchyme of pharyngeal arch 2 (2), mesentery of midgut (1), mesoderm condensation in hand plate (1), mesonephric capsule (7), mesonephric duct near junction with urogenital sinus (2), mesonephric glomerulus (7), metanephrogenic blastema (17), middle secondary bronchus bud (3), middle sulcus (10), midgut mesenchymal condensation (1), midgut mesentery (6), midpoint of herniated midgut (3), motor root of trigeminal nerve (CN V) (17), muscular part of interventricular septum (19)
Nnaris (16), nasal fin (8), nasal sac (3), nasal sac epithelium (1), nasal septum region (2), nasomaxillary groove (10), neural arch (148), neural layer of retina (15), neurohypophyseal bud (14)
Ooccipital myotome (6), oculomotor nerve (CN III) (95), olfactory sac (1), opening of adenohypophysial pouch (2), optic ventricle (4), origin of aortic arch 6 from truncus arteriosus (1), origin of celiac artery (3), origin of external carotid artery (1), otic capsule condensation (9)
Ppaleopallium (7), parachordal condensation (skeletal blastema of cranium) (2), paraphysial arch (3), pelvic part of peritoneal cavity (1), pharyngeal condensation (2), pharyngeal pouch 3 (dorsal part becomes inferior parathyroid gland) (1), pharyngeal pouch 4 (dorsal part becomes superior parathyroid gland) (1), pharyngeal pouch 4 (ventral part) (1), phrenic nerve (55), pigmented layer of retina (19), pineal bud (12), pleuroperitoneal membrane (12), pleuroperitoneal opening (10), pneumo-enteric recess (5), pons region (metencephalon) (33), pre-optic area (8), precartilage condensation of pharyngeal arch 1 (Meckel) (3), precartilage condensation of pharyngeal arch 2 (5), premuscle mass of tongue (6), presumptive suprarenal gland cortex (2), primary bronchus (21), primordial filum terminale (10), primordial filum terminale in three parts (1), primordial meninx (43), primordial paramesonephric groove (4), primordial perineum (1), primordial pleural cavity (10), primordial renal pelvis (4), primordial urethral fold (1), primordium of lateral palatine process (3), proximal limb of herniated midgut (99), proximal limb of herniated midgut endoderm (1), pulmonary condensation (1), pulmonary trunk (28)
Rradial nerve (23), rectal part of cloaca (1), rectum (38), region of olfactory filia (CN I) (4), resorbing thyroglossal duct (4), rhombic lip of metencephalon (1), rib 12 blastema (5), right and left valves of sinus venosus (1), right and left venous valves (1), right hepatic duct (1), right pulmonary artery (15), roof of pharynx (2), roof of third ventricle (8), roof plate of mesencephalon (35), root of oculomotor nerve (CN III) (10), root of trochlear nerve (CN IV) (13), rupture point of superior mesenteric vein (1), ruptured superior mesenteric vein (1)
SS-1 spinal nerve (21), S-1 ventral primary ramus (10), S-1 ventral root (3), S-2 spinal nerve (17), S-2 ventral primary ramus (12), S-2 ventral root (1), S-3 spinal nerve (16), S-4 spinal nerve (16), secondary interatrial septum (septum secundum) (14), semilunar valve region (2), skeletal blastema of femur (8), skeletal blastema of forearm (1), skeletal blastema of humerus (5), skeletal blastema of proximal humerus (1), skeletal blastema of radius and ulna (1), spleen (42), splenic artery (4), splenic vein (8), sternocleidomastoid / trapezius premuscle mass (3), striatal part of cerebral vesicle (telencephalon) (5), subclavian artery (16), superior laryngeal nerve (1), superior mesenteric vein (48), superior mesenteric vessels (7), suprarenal gland medulla (21), suprastriatal part of cerebral vesicle (telencephalon) (5), sympathetic neuroblasts (5), sympathetic trunk (285)
TT-1 dorsal primary ramus (2), T-1 dorsal root (5), T-1 intercostal nerve (8), T-1 spinal nerve (8), T-1 ventral primary ramus (5), T-1 ventral root (3), T-10 dorsal root (1), T-10 intercostal nerve (9), T-10 spinal nerve (12), T-10 ventral root(s) (5), T-11 dorsal and ventral roots (2), T-11 dorsal root (2), T-11 spinal nerve (8), T-11 ventral root (3), T-12 dorsal and ventral roots (1), T-12 dorsal root (3), T-12 myotome (1), T-12 spinal nerve (14), T-12 subcostal nerve (2), T-12 ventral root (4), T-2 dorsal root (2), T-2 intercostal nerve (11), T-2 spinal nerve (12), T-2 ventral root (1), T-3 dorsal primary ramus (2), T-3 dorsal root (1), T-3 intercostal nerve (11), T-3 spinal nerve (3), T-3 ventral primary ramus (2), T-3 ventral root (3), T-4 dorsal and ventral roots (1), T-4 dorsal primary ramus (3), T-4 dorsal root (2), T-4 intercostal nerve (11), T-4 spinal nerve (6), T-5 dorsal root (1), T-5 intercostal nerve (7), T-5 spinal nerve (7), T-5 ventral root (3), T-6 dorsal root (4), T-6 intercostal nerve (10), T-6 spinal nerve (12), T-7 intercostal nerve (6), T-7 spinal nerve (7), T-7 ventral root (2), T-8 dorsal primary ramus (1), T-8 dorsal root (2), T-8 spinal nerve (11), T-8 ventral root (2), T-9 dorsal and ventral roots (1), T-9 dorsal primary ramus (1), T-9 dorsal root (3), T-9 intercostal nerve (6), T-9 spinal nerve (11), T-9 ventral root (4), tectum of mesencephalon (M2) (2), terminal branches of facial nerve (CN VII) (1), terminal branches of mandibular nerve (CN V₃) (1), terminal branches of maxillary nerve (CN V₂) (1), terminal part of glossopharyngeal nerve (CN IX) (2), thigh (15), thigh mesoderm (1), thoracic wall (1), trachea (endoderm) (6), trachea near bifurcation (1), tracheal condensation (4), transition region (7), transition region between telencephalon and diencephalon (1), transverse sinus (12), trochlear nerve (CN IV) (140), truncus arteriosus (distal outflow tract) (2), tuberculum olfactorium (5), tubule entering mesonephric duct (1)
Uulnar nerve (31), undivided conus cordis (1), undivided truncus arteriosus (4), undivided truncus arteriosus (distal outflow tract) (2), union of C-7 and C-8 spinal ganglia (1), upper limb mesenchyme (1), upper secondary bronchus bud (8), urethral groove (15), urogenital sinus part of cloaca (1)
Vvascular plexus on surface of cerebral vesicle (1), ventral (hypothalamic) sulcus (8), ventral edge of pons region (metencephalon) (1), ventral pancreas and bile duct (1), ventral part of pharyngeal pouch 3 becomes thymus gland (2), ventral part of pons region (metencephalon) (1), ventral primary ramus (4), ventral ramus of C-4 spinal nerve (1)
Wwall of truncus arteriosus (distal outflow tract) (3)

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