Keeping busy and happy helps you to deal with life when things go wrong. Feeling nervous about something? Well we're all full of nerves aren't we? But if you often feel worried or afraid it is a good idea to to one or more of your trusted s. The two main parts of the nervous system are the central nervous system and the peripheral (say per-if-er-al) nervous system. How nerve cells work, at the end of each nerve cell there is a synaptic terminal (say sin-ap-tik term-in-ul).