Changes

==Connective Tissue==

==Connective Tissue==

 

Peripheral nerves have a three-tiered hierarchical arrangement of connective tissue. A nerve fibre is surrounded by a connective tissue matrix called the '''endoneurium'''. Bundles, or '''fasicles''' of neurons are enclosed in a second connective tissue layer called the '''perineurium'''. Groups of fascicles are then gathered together in a third connective tissue layer called the '''epineurium'''. Renaut bodies (loose, cigar-shaped whorls of extracellular matrix within fascicles) may be present in some species, particularly in horses. Renaut bodies may also occur in human and rat nerves at points of stress or compression.

* Peripheral nerves have a three-tiered hierarchical arrangement of connective tissue.

** A nerve fibre is surrounded by a connective tissue matrix called the '''endoneurium'''.

** Bundles, or '''fasicles''' of neurons are enclosed in a second connective tissue layer called the '''perineurium'''.  

** Groups of fascicles are then gathered together in a third connective tissue layer called the '''epineurium'''.  

* Renaut bodies may be present in some species.

** They are loose, cigar-shaped whorls of extracellular matrix within fascicles.

** Common in horse nerve.

** May also occur in human and rat nerves at points of stress or compression.

==Blood Supply==

==Blood Supply==