External appearance of the embryo and fetus Back

Whole embryo - 4th week




1. Aorta
2. Abdominal cavity
3. Body wall
4. Dermatome
5. Dorsal mesenthery
6. Midgut
7. Myotome
8. Sclerotome
9. Spinal cord
10. Spinal ganglion
11. Umbilical cord
12. Urogenital ridge
13. Vitelline vein

Technique: Paraffin section Staining: Hematoxylin-eosin Orientation: Transverse section Developmental age: 4 weeks Magnification (objective): x 10