2nd October 2019

lumenlearning
15

What do you call a bundle of axons?

In the peripheral nervous system a bundle of axons is called a nerve. In the central nervous system a bundle of axons is called a tract. Each axon is surrounded by a delicate endoneurium layer. The course connective tissue layer called perineurium, binds the fibers into bundles called fascicles.

Just so, what surrounds a bundle of nerve fibers?

Motor nerves have only efferent fibers, long axons of motor neurons. A connective tissue sheath called the epineurium surrounds each nerve. Each bundle of nerve fibers is called a fasciculus and is surrounded by a layer of connective tissue called the perineurium.

What are the 3 layers of connective tissue around a nerve?

The three layers of connective tissue surrounding each nerve are:
  • Endoneurium. Each nerve axon, or fiber is surrounded by the endoneurium, which is also called the endoneurial tube, channel or sheath.
  • Perineurium.
  • Epineurium.

What is the connective tissue wrapping that surrounds bundles fascicles of axons?

The axons are bundled together into groups called fascicles. Each fascicle is wrapped in a layer of connective tissue called the perineurium. Finally, the entire nerve is wrapped in a layer of connective tissue called the epineurium.
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