What is the difference between Myelinated and Non-Myelinated Nerve Fibre?

The difference between Myelinated and Non-Myelinated Nerve Fibre are given below:

Myelinated Nerve Fibre:

1. The nerves that are insulated by a sheath or myelin called myelinated nere fibre.

2. These are made up of lipid & protein and so, appear white.

3. These have nodes of Ranvier which always constant in number.

4. Nerve fibres outside CNS and myelinated.

Non-Myelinated nerve fibre:

1. The nerves which lack such sheath are called non-myelinated nerve fibre.

2. They appear grey because of absence of myelin sheath.

3. They do not have node of Ranvier.

4. Post-ganglionic sympathetic nerves are non-medulated.