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Label Key:1. 1st pharyngeal arch (maxillary process) 2. stomodeum 3. 1st pharyngeal arch (mandibular process) 4. 2nd pharyngeal arch 5. hindbrain 6. forebrain 7. heart 8. auricular groove 9. right anterior cardinal vein | ||
All ages referenced to fertilization, not last menstrual period. |