PROCIRKSSIVE TISSU1-: CHANCIIS. 193 



recognized microscopically especiall_v if the section is stained 

 with hematoxylin and picro-fuchsin. 



Effects. 



A part affected with parenchymatous hyperplasia will have 

 an increased functional capacity. The effects of an increased 

 functional capacity of a structure depends upon the part in- 

 volved, and may or may not be injurious to the animal in which 

 it occurs. 



Interstitial hyperplastic structures have an increased quantity 

 of fibrous tissue and usually a diminished amount of parenchy- 

 matous tissue and a diminished function. Interstitial hvper- 

 plasia of the walls of hollow organs may cause irregularity of 

 the lumen (intestine) and hinder passage of the organ's con- 

 tents. 



METAPLASIA. 



Metaplasia is the name applied to the conversion of a devel- 

 oped or matured tissue into another closelv related. Under 

 normal conditions a matured tissue has specific cells and a char- 

 acteristic structure. The character of a tissue may be changed 

 by certain pathologic conditions. Metaplasia should not be con- 



Fig. 110 — Fibrous Tissue Ossification. 



a. Fibrous tissue. b. Osteoblasts. 



