1. Cervical flexure
2. Diencephalon
3. Duodenum
4. Esophagus
5. Gonadal ridge
6. Heart
7. Hindgut
8. Liver
9. Mesonephros
10. Mesencephalon
11. Midbrain flexure
12. Midgut
13. Rathke's pouch
14. Respiratory diverticulum
15. Rhombencephalon
16. Spinal cord
17. Spinal ganglion
18. Telencephalon
19. Tongue
20. Ureteric bud
21. Vertebral column

Technique: Paraffin section
Staining: Hematoxylin-eosin Orientation: Longitudinal section Developmental age: 5 - 6 weeks Magnification (objective): x 10