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Endoneurium

Transverse section of human tibial nerve.

Nerve structure
Gray's	subject #183 728
MeSH	Endoneurium

The endoneurium is a layer of delicate connective tissue that encloses the myelin sheath of a nerve fiber within a funiculus.^[1]

It is continuous with septa which pass inward from the innermost layer of the perineurium, and shows a ground substance in which are imbedded fine bundles of fibrous connective tissue, primarily collagen, running for the most part longitudinally.

It serves to support capillary vessels, arranged so as to form a net-work with elongated meshes.

It is found in other places too, such as surrounding the Schwann cells on the peripheral side of the transitional zone on the auditory nerve.^[2]

References

^ Elaine N. Marieb and Katja Hoehn (2007). Human Anatomy & Physiology (7th Ed.). Pearson, 498-9. ISBN 0-805-35909-5.
^ Fraher JP (2000). "The transitional zone and CNS regeneration". J. Anat. 196 (Pt 1): 137–58. PMID 10697296.

External links

Endoneurium at eMedicine Dictionary
Histology at BU 21301loa - "Ultrastructure of the Cell: myelinated axon and Schwann cell"
Histology at BU 21401loa - "Ultrastructure of the Cell: arteriole and peripheral nerve"
Histology at OU 1_03
Histology at University of California, Los Angeles
Diagram at Howard University

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v • d • e Histology: nervous tissue

Neurons (gray matter)	soma - axon (axon hillock, axoplasm, axolemma, neurofibril/neurofilament) dendrite (Nissl body, dendritic spine, apical dendrite, basal dendrite) types: bipolar - pseudounipolar - multipolar - pyramidal - Purkinje - granule

Afferent nerve/Sensory nerve/Sensory neuron	GSA - GVA - SSA - SVA - fibers (Ia, Ib or Golgi, II or Aβ, III or Aδ or fast pain, IV or C or slow pain)

Efferent nerve/Motor nerve/Motor neuron	GSE - GVE - SVE - Upper motor neuron - Lower motor neuron (α motorneuron, γ motorneuron)

Synapses	neuropil - synaptic vesicle - neuromuscular junction - electrical synapse - Interneuron (Renshaw)

Sensory receptors	Meissner's corpuscle - Merkel nerve ending - Pacinian corpuscle - Ruffini ending - Muscle spindle - Free nerve ending - Olfactory receptor neuron - Photoreceptor cell - Hair cell - Taste bud

Glial cells	Astrocyte (Radial glia) - Oligodendrocyte - Ependymal cells (Tanycytes) - Microglia

Myelination (white matter)	CNS: Oligodendrocyte PNS: Schwann cell - Neurolemma - Nodes of Ranvier/Internode - Schmidt-Lanterman incisures

Related connective tissues	epineurium - perineurium - endoneurium - nerve fascicle - meninges