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The prosencephalon has two subdivisions, the telencephalon: that will form the cerebral hemispheres, and the diencephalon: that will form optic and thalamic tissues and other structures.

 

                     Species: Mouse 
                     Day Gestation: 10 
             Approx. Human Age: 5 weeks 
                                   View: Sagittal Cut 
                 Brain (Weeks 5-9)
                                      10 of 20