Multipolar Neurons - Structure and Functions
Nerve Structure (Anatomy and diagram)
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Nerves are the organs that make up the peripheral nervous system (PNS). They serve as information pipelines that allow the brain and spinal cord to communicate with other tissues and organs.
- Inside the nerves, groups of
neurons (nerve cells) are organized into bundles called
fascicles (fasciculi).
- Surrounding and holding together each fascicle is the
perineurium.
Identify holes in your nervous system anatomy knowledge with these interactive quizzes and labelling exercises.
- This layer appears concentrically laminated and is composed of flattened cells, basement membrane, and collagen fibers.
- Inside the fasicles, neurons and blood vessels are held in place by a loose connective tissue referrred to as
endoneurium.
Epineurium, a layer of dense connective tissue, covers and holds together the outer surface of nerves.
Arteries and veins are located between the fascicles. Branches of these vessels enter the fascicles and supply the neurons with nutrients and gases.


