Nerve fibers of ANS
Ganglia possess two types of nerve fibers- Pre ganglionic nerve fiber and Post ganglionic nerve fiber.
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.