Question

What are nerves? Mention the types of neurons found in humans.

Answer 1

A nerve is an enclosed, cable-like bundle of axons in the peripheral nervous system
Neuron are found in nervous system in all the body.

Answer 2

Nerves are the longest cell of our body. They constitute of smaller & functional units called neurons. They help in sending messages to & fro from our brain to various parts of our body & vice-versa.
types of neurons ( Structure)
i) non-polar
ii) uni polar
iii) Pseudounipolar 
iv) multipolar