Cranial Flexure

Cervical Flexure

Optic Cup

Olfactory Placode

Lens

Mesenceophalon

MetencephalonMyelencephalon

Spinal Cord

Dorsal Flexure

Wing bud

Wing Bud

Caudal Flexure

Leg Bud

Leg Bud

Tail Bud

Spinal Cord

Myelencephalon (neuromere)

Metencephalon

Otic Vesicle

Ganglion,cranial verve 9, Glossopharyngeal

CN 8, Auditory

Yolk Sac

Amnion

Somites

Level of the Otic Vesicle

Trigeminal Ganglia

(V)

Spinal Ganglion

Spinal Cord

G, CN 10

Dorsal Aorta

Pharynx

Spinal Ganglion

G, CN 5

Internal Carotid Artery

Mesencephalon

Cranial Cardinal Vein

Cranial Cardinal Vein

Level of the Pharynx

PA 2

Mandibular Arch (PA1)

Maxillary Arch of PA 1

AA 2

AA 1PP 2

PP 1

Level of the Pharynx

PG 1

PG 2

Thyroid

Oral Plate

Pre-oral gutSeesel’s Pocket

Stomodeum

Spinal Cord

Mesencephalon

Level of Thyroid

Anterior Cardinal vein

Internal Carotid Artery

Dorsal Aorta

Anterior Cardinal

Vein

PA 1 (mandibular process) + AA 1

PA 2 (Hyoid) + AA 2

PA 3 + AA 3

PA 4+ AA 4

PA 1 (maxillary process)

Infundibulum

Rathke’s Pouch

Stomodeum

Cranial cardinal vein

Internal carotid artery

Cranial Nerve 3

Intersegmental Artery

Rathke’s Pouch

Stomodeum

Level ofRathke’s Pouch

Level ofLaryngotracheal Groove

Starting Optic Cup

Diencephalon

Posterior Cardinal Vein

Larynx

Common Cardinal Vein

Atrium

Bulbus Cordis

Sinus Venosus

LensOptic Cup

Dermatome

Myotome

Scelerotome

Esophagus

Lung Bud

Sinus Venosus

Optic Cup

Lens

Level ofLung Buds

Dorsal Mesocardium

Caudal Cardinal Vein

Common Cardinal Vein

Diencephalon

Spinal Cord

Mesoesophagus

Sensory layer of optic cup

Pigmented Layer of Optic Cup

Lens Vesuicle

Stomach

Dorsal mesentery

Ventral Mesocardium

Caval Fold

Ductus Venosus

Ventricle

Cranial Liver Diverticulum

Caudal Liver Diverticulum

Olfactory Pit

Diencephalon

Cerebral Hemisphere of Telencephalon

Level of Olfactory Pit

Epiphysis of Telencephalon

Duodenum

Vitelline Vein

Dorsal Pancreatic Rudiment

Ventricle

Vitelline Vein

Level of Pancreas

Caudal Cardinal Vein

Allantoic Vein

Wing Bud

Pronephros

Vitelline Vein

Anterior Intestinal

Portal

Yolk Sac

Spinal Cord

Descending Aorta

Posterior Cardinal Vein

Level of Anterior Intestinal

Portal

Lateral Body Fold

Pronephric Tubules

Level of the Leg Bud

Mesonephric Duct

Leg Bud

Hindgut

Allantois

Chorioamniotic raphe

Tail Bud

Spinal Cord

Yolk Sac

Apical Ridge

Dorsal Aorta

Embryonic Coelom

Subcaudal Pocket

Level of Anterior Intestinal Portal

Cloacal Membrane

(upon fusion)

Cloaca

Spinal Cord

Dorsal Aorta

Yolk Sac

Mesonephric Duct