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NERVE-TISSUE. 

 2. NERVES. 



Nerves are thread-like formations of bioplasson connecting 

 the nerve-centers with the periphery of the body. They are 

 of two kinds: first, those endowed with a myeline investment, 



FIG. 124. BRANCH OF THE MOTOR OCULI NERVE OF MAN. 



L, longitudinal, T, transverse section of the bundle ; PE, external perineurium ; PI, 

 internal perineurium; ML, myeline investment; A, axis-cylinder; M, transverse sections of 

 muscle-fibers. Magnified 600 diameters. 



the medullated or white nerves; and secondly, those which 

 are without a myeline investment, the non-medullated or gray 

 nerves. 



