<Li> Perineurium . Each nerve fascicle containing one or more axons, is enclosed by the perineurium, a connective tissue having a lamellar arrangement in seven or eight concentric layers . This plays a very important role in the protection and support of the nerve fibers and also serves to prevent the passage of large molecules from the epineurium into a fascicle . </Li> <Li> Epineurium . The epineurium is the outermost layer of dense connective tissue enclosing the (peripheral) nerve . </Li> <P> The function of nervous tissue is to form the communication network of the nervous system by conducting electric signals across tissue . In the CNS, grey matter, which contains the synapses, is important for information processing . White matter, containing myelinated axons, connects and facilitates nerve impulse between grey matter areas in the CNS . In the PNS, the ganglion tissue, containing the cell bodies and dendrites, contain relay points for nerve tissue impulses . The nerve tissue, containing myelinated axons bundles, carry action potential / nerve impulses . </P> <P> Neoplasms (tumours) in nervous tissue include: </P>

What is the primary function of the nervous tissue
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