132 



TISSUES IN GENERAL. 



Just as the amoeba is a protoplasmic lump, in which the 

 living matter is arranged in the form of a reticulum, whose 

 points of intersection are also living matter, so the body of even 

 a highly organized mammal is a lump, traversed by a living 

 reticulum, whose points of intersection are living matter in the 

 shape of protoplasmic corpuscles, hitherto termed cells. 



FIG. 46. SCHEMA OF THE STRUCTURE OF THE VARIETIES OF CON- 

 NECTIVE TISSUE. [PUBLISHED IN 1873.] 



Every tissue, as the history of development teaches, is built 

 up by a number of protoplasmic lumps, which we may consider 

 as the elements of the tissue. In a completely formed tissue, the 

 cell and its territory (Virchow) represent the unit of the tissue, 



