Publisher Summary The origin of all cells in the body is the fertilized ovum. Studies of the
mechanisms resulting in the development of different cell types, tissues, and organs from
this single cell represent one of the most active fields of current research. Certain
hemopoietic tissues contain cells capable of forming induced bone when exposed to a
suitable environment. The bone formed from these undifferentiated mesenchymal cells is of
a temporary nature; repeated acts of inductive activity are required for osteogenesis to be …