What are the two parts of the nervous system?

  The central nervous system is made up of the brain and spinal cord.

   The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body.

i think the miocene epoch spans the time from 23 million to 12 million years ago.

humans are now responsible for causing changes in the environment that hurt animals and plant species. we take up more space on earth for our homes and cities. we pollute habitats. human activity often changes or destroys the habitats that plants and animals need to survive.