Question

great! we need to give the 3d printer one more crucial bit of information to create a functional nerve model.
what is the correct order of the structures of the nerve, starting from the inside?
a) perineurium, endoneurium, axon, myelin sheath, epineurium
b) axon, endoneurium, myelin sheath, epineurium, perineurium
c) axon, myelin sheath, endoneurium, perineurium, epineurium
d) endoneurium, axon, myelin sheath, epineurium, perineurium

Explanation:

• The axon is the innermost part of a nerve fiber.
• Surrounding the axon is the myelin sheath (in myelinated nerves).
• The endoneurium is a connective - tissue layer that surrounds individual nerve fibers (including axon and myelin sheath if present).
• Bundles of nerve fibers (fascicles) are surrounded by the perineurium.
• The entire nerve (containing multiple fascicles) is surrounded by the epineurium.

Answer:

C. Axon, myelin sheath, endoneurium, perineurium, epineurium