Whole embryo - 4th week
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1. Cloaca
2. Dorsal aorta
3. Hindgut diverticulum
4. Lower limb
5. Mesonephric duct
6. Mesonephric tubule
7. Neural groove
8. Peritoneal cavity
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Technique: Paraffin section
Staining: Hematoxylin-eosin
Orientation: Transverse section
Developmental age: 4 weeks
Magnification (objective): x 10
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