Nos. (120-621] CANCER'S PLACE IN BIOLOGY 



405 



tions of cells) and have been numerically classified by 

 the writer as primary (restauro-), secondary (expando-j, 

 and tertiary (migro-) cytoplasia. This classification is 

 applicable to the regenerative cells of epithelial tissue of 

 the mammary gland, prostatic gland, skin, hair follicle, 

 stomach, fibrous connective tissue, erythrocytic tissue 

 (red blood corpuscles) and lymphocytic tissue. These 

 represent eight tissues out of possible nineteen or more 

 known specific tissues in the human body. Doubtless 

 there are other specific tissues in the human economy and 

 perhaps some of those already mentioned may be even- 

 tually divided into other specific tissues. In all of the 

 following tissues, adenotex, cardiomyotex, chondrotex, 

 endotheliotex, epitheliotex, erythrotex, fibrotex, leucotex, 

 leiomyotex, lipotex, lymphotex,, melanotex, myxotex, 

 neurotex, osteotex, pilotex, rhabdomyotex and tendotex, 

 with the exception of the neurotex and perhaps the myxo- 

 tex, the fact has been demonstrated that all are regener- 

 ated after loss, the degree of regeneration varying con- 

 siderably in the human body. 



The following classification of the three biologic reac- 

 tive phenomena which take place in the regenerative cells, 

 of tissues may be made: 



