MODIFICATION IN THE FOKM OF CELLS. 



29 



striped muscle, may undergo reduplication without division of the 

 cell (Fig. 23). 



The cell-contents, or protoplasm, particularly as regards its granular 

 constituents, may undergo the greatest variation. Often true crystalline 



Pig. 23.— Bone-Corpuscles, with their Prolongations, after Eollett. 



(Flint.) 



formations are included in the cell-contents ; or vacuoles may form in 

 which different fluids, sometimes watery, sometimes fatty, may collect, to 

 again disappear in later stages of the life of the cell. 



Fig. 24.— Diagram of Different Forms of Cartilage. (Ellenberger.) 

 A, hyaline; B, fibro-cartilage ; C, elastic cartilage; D, secondary cartilaginous capsule, containing 

 the primary capsule. 



Another modification in the form of cells consists in the alteration 

 of the border layers of protoplasm, so that the cell is surrounded by a 

 more or less chemically or morphologically different area, or intercellular 



