Whole embryo - 7th week
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1. Aorta
2. Esophagus
3. Left atrium
4. Notochord
5. Pericardial cavity
6. Pulmonary artery
7. Ribs
8. Right atrium
9. Spinal cord
10. Spinal ganglion
11. Thoracic wall
12. Trachea
13. Vertebral column
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Technique: Paraffin section 3
Staining: Hematoxylin-eosin
Orientation: Transverse section 11
Developmental age: 7 weeks
Magnification (objective): x 10
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