CHAPTER II. 
THE CELL. 
10. The Cell.—The whole of the tissues of a plant are 
composed of units called Crnis (fig. 10). These re- 
semble the cells of animal tissue in many respects, but 
Fie. 10.—Typical Cells. 
n. Nucleus. v. Vacuole. cy. Cytoplasm. 
differ from them in that they are surrounded by a firm 
wall made of a carbohydrate called CrnuuLose. A 
typical cell is found to contain a mass of CyTorLAsm, a 
fluid-like substance consisting of a clear ground sub- 
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