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. . . illustrates the relationship of the developing heart and aortic sac to the pharyngeal arches. The arches surround the pharynx and contain aortic arch blood vessels.

 
                     Species: Mouse 
                     Day Gestation: 9 
             Approx. Human Age: 27 days 
                                   View: Frontal 
               Pharyngeal Arches
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