nuclear membrane 



chromatin 

 granules 



INCLUSIONS 



glycogen 



ORGANELLES 



mitochondria 



cell 

 membrane 



chromidiai 

 substance 



Golgi 

 apparatus 



entrioles 



secre 

 g,ranules 



Figure 2-2. Diagrammatic Drawing of a Composite Cell, designed to 

 show in a single cell the various components of nucleus and cytoplasm that 

 can be demonstrated with the light microscope. Cytoplasmic organelles are 

 shown on the right and cytoplasmic inclusions on the left. (From Ham, 

 A. W., 1957. "Histology," 3rd ed., J. B. Lippincott Co., Philadelphia, Pa., 

 Fig. 52, p. 74.) 



protoplasmic constituents vary from cell to cell and from tissue to tissue 

 with the age of the cell and the kind and degree of differentiation. None- 

 theless, crude analysis has given us some idea of kinds of substances and 

 their relative percentages which are characteristic of living matter gen- 

 eraUy (Table 2-2). 



TABLE 2-2. Chemical Components of Protoplasm. 



12 / CHAPTER 2 



