STRUCTURE OF CELL. 
Fig. 10.—NERvVoUus TISSUES. 
z Transverse section of small nerve. 2. Multipolar nerve-cell. 
3. Bipolar nerve-cell. 
Structure of the Cell.—We may now pass from the 
external form of a cell to its internal structure. Inside the 
cellmembrane is the cytoplasm or cell-protoplasm. Lying 
in the cytoplasm is the wwcleus surrounded by a delicate 
Fig. 11.—DIAGRAM OF A CELL. (After CARNOY.) 
Chromatin. 
Nucleolus. Cytoplasm. 
Nuclear 
Membrane. 
Centrosome. 
nuclear membrane. ‘The nuclear substance is composed of 
a clear fluid called nuclear sap and chromatin, so called 
because of its staining properties, which is usually in the 
form of a fine meshwork. There may also be one or more 
rounded bodies, the zzcleolz. Near the nucleus there is 
a clear rounded body, with radiating processes, called the 
