Medical Term:
endoneurium
Pronunciation: en′dō-nū′rē-ŭm
Definition: The innermost connective tissue supportive structure of nerve trunks, surrounding individual myelinated and unmyelinated nerve fibers; consists principally of ground substance, collagen, and fibroblasts; with the perineurium and epineurium, composes the peripheral nerve stroma.
Synonym(s): Henle sheath, sheath of Key and Retzius
[endo- + G. neuron, nerve]
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