Nerve fibers of ANS
Ganglia possess two types of nerve fibers- Pre ganglionic nerve fiber and Post ganglionic nerve fiber.
![Nerve fibers of ANS](https://vetscraft.com/wp-content/uploads/2021/08/083-Nerve-fibers-of-ANS.jpg)
Pre ganglionic nerve fiber
Nerve fiber from CNS to cells of ganglia for synapse. Pre ganglionic nerve fiber are small, myelinated with conduction velocity of 3-15 m/sec, representing class B fiber.
Post ganglionic nerve fiber
Nerve fibre from ganglia to effector organ. Post ganglionic nerve fiber are non-myelinated, small , class C fibers with conduction velocity of 0.7-2.3 m/sec.