FIG. 17. A section through the cerebrum, as it appears to the naked eye. Nearly actual size. After Edinger, 243, 165. The Structure of Neurones.-Different names are given to the different parts of a neurone or nerve cell. The thickened part containing the nucleus is called the cell-body. The process that diminishes in size slowly in its course and commonly goes a considerable distance from the cell-body and gives off branches rather infrequently until it frays out at its end, is called the ariscylinder process or neuraxon or axone. The one or more processes that diminish rapidly in size, that commonly FIG. 12. A photograph of a section of the spinal cord in an early stage of the development of the nervous system. After Starr, 20, Plate 2. X 27 Diameters. |