Crossword (:

4. ne of three major parts of the autonomic nervous system: the others being the enteric and parasympathetic systems
5. center of the nervous system in all vertebrate
9. affects heart rate, digestion, respiratory rate, salivation, perspiration, pupillary dilation, micturition
13. region of the vertebrate neural tube which gives rise to posterior forebrain structures
15. lower half of the brainstem
17. a long, thin, tubular bundle of nervous tissue and support cells that extends from the brain
18. largest portion of the brain
20. is one of two large chambers that collect and expel blood received from an atrium towards the peripheral beds within the body and lungs.

1. is a midline symmetrical structure within the brains of vertebrates including humans, situated between the cerebral cortex and midbrain.
2. a portion of the brain that contains a number of small nuclei with a variety of functions
3. nervous system (PSNS, or occasionally PNS) is one of the two main divisions of the autonomic nervous system (ANS).
6. is an electrically excitable cell that processes and transmits information through electrical and chemical signals.
7. consists of the nerves and ganglia outside of the brain and spinal cord
8. clear colorless bodily fluid produced in the choroid plexus of the brain
10. complex network of nerves and cells that carry messages to and from the brain and spinal cord to various parts of the body.
11. portion of the central nervous system associated with vision, hearing, motor control, sleep/wake, arousal (alertness), and temperature regulation
12. part of the nervous system that integrates the information that it receives from
14. region of the brain that plays an important role in motor control.
16. system of membranes which envelops the central nervous system
19. enclosed, cable-like bundle of axons (the long, slender projections of neurons) in the peripheral nervous system.