that fibroblasts are formed only by embryonal connective tissue cells , and not by wandering cells , such as the large mononuclear leucocytes , we are well aware , is possibly still a disputable assumption , and we do not consider it pertinent to discuss the question any further in connection with this study , but would only emphasize the point that some of the cells of tuberculous proliferations may , under favorable circumstances , become formative cells , and , furthermore , that the amount of formative tissue produced may be far in excess of what is actually needed for purposes of repair only .
C0016030
fibroblasts
C0007634
cells