Y2 LECTURE II. 



Henle, and Schwann, were wrong in maintaining that 

 ultimately at best only nuclei or nucleus-fibres remained ; 



FIG. 20. 



m 



and that, on the contrary, in most cases the cells them- 

 selves preserve their integrity. The connective tissue 

 of a later period is therefore not distinguished in its 

 general structure and disposition in any respect from 

 that of an earlier date. There is not an embryonic con- 

 nective tissue with spindle-shaped cells and a perfectly 

 developed one without them, but the ceils remain the 

 same, although they are often not easy to see. 



Essentially, therefore, this whole series of lower tis- 

 sues may be reduced to one simple plan. Usually, the 

 greater part of the tissue is composed of intercellular 

 substance, in which, at certain intervals, cells lie imbed- 

 ded, which in their turn present the most manifold forms. 

 But these tissues cannot be distinguished by one's con- 

 Fig. 20. Connective tissue from the embryo of a pig, after long-continued boil- 

 ing. Large spindle-shaped cells (connective-tissue corpuscles (Bindegewebskorper- 

 chen)), some isolated, some still imbedded in the basis-substance, and anastomosing 

 one with the other. Large nuclei, with their membrane detached ; cell-contents in 

 some cases shrunken. 350 diameters. 



