Science

3. the nervous system outside the brain and spinal cord.
6. relating to the part of the autonomic nervous system which balances the action of the sympathetic nerves
10. the fundamental units of the brain and nervous system
11. the part of the brain at the back of the skull in vertebrates

1. acting or occurring involuntarily
2. the cylindrical bundle of nerve fibres and associated tissue which is enclosed in the spine and connects nearly all parts of the body to the brain
4. the instinctive physiological response to a threatening situation, which readies one either to resist forcibly or to run away
5. the principal and most anterior part of the brain in vertebrates
7. the part of the peripheral nervous system associated with the voluntary control of body movements via skeletal muscles
8. the inner region of an organ or tissue
9. made up of the brain and spinal cord