Question

What does the nervous system contain?

Answer 1

central nervous system: brain and spinal chord.

peripheral nervous system : cranial nerves (which arise from brain.)

and spinal nerves(which arise from spinal chord).

Answer 2

Neurons are the functional unit of nervous system.

It consist of:

Cyton or cell body which has nucleus and cytoplasam

Short branched projections called dedrons or dendrites

Single long projection called Axon

And nerve ending or axon terminal