Brain Evolution: Brainstem and Cerebellum followed by Spinal Cord - Neurology & Neuroscience

The  brain  is  a  complex  organ  that  serves  as  the  center  of  the nervous system. The brain exists in human, animals and trees, from microscopic  size  in  viruses  to  the  complex  composition  in  human being.  The  brain  is  composed  of  the  cerebrum,  the  brainstem  and  the cerebellum and followed by the spinal cord. This very specific organ is located inside the skull bones of the head. The shape and size of the brain varies greatly between species from more primitive ones to advanced brains.

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