278 



MICROSCOPIC ANATOMY OF THE ORGANS. 



arborizations, the so-called Golgi's tendon spindles, or by means 

 of Vater-Pacinian corpuscles ; some end in the vessels. 



Mmde_ 

 nucleus' 



FIG. 204. 



Muscle 



Perimysinm--^ 



Tendon 



Tendon eel I 



\ _. 



J!a.riQi 



From a longitudinal section through the gastrocnemius muscle of a frog, showing the 

 transition from muscle to tendon, x 200. 



The fascice are connective-tissue membranes whose bundles 

 of fibrils usually form interlacing layers. They contain as a 

 rule a great many elastic fibres. 



VII. NERVOUS SYSTEM. 



1. CENTRAL NERVOUS SYSTEM. 



A. Spinal Cord. 



Even with the naked eye, the gray and white matter can be 

 distinguished in a cross-section of the spinal cord. The former 

 occupies a central position and is surrounded by white matter. 

 The relative amount of gray matter varies in different regions 

 of the cord. In the sacral region it is present in larger amount 

 than is the white matter (Fig. 208). In all parts of the cord 



