44 Introductory Biology 



Nucleoplasm or Nuclear Sap. — This 

 makes up the colorless, fluid, ground 

 substance of the nucleus and fills 

 the spaces not occupied by other nu- 

 clear structures. It must be re- 

 membered that all parts of a cell 

 work together and the life of the 

 cell depends on the balanced inter- 

 actions between the various parts 

 of the nucleus and cytosome. Some- 

 times the term protoplast is applied 

 to all living parts of a cell, in con- 

 trast to the nonliving metaplast (in- 

 clusions). 



Nucleoplasm or Nuclear Sap. — The 

 rather viscous, liquid material with- 

 in the nucleus is the nuclear sap. 

 Sometimes it is called karyolymph 

 (Gr. karyon, nucleus; L. lympha, 

 water). A cell can function nor- 

 mally only when all parts of the nu- 

 cleus and cytosome interact prop- 

 erly. Sometimes the term proto- 

 plast is applied to all the living parts 

 of the cell. 



