Cells, which differentiate into osteoblasts, are located in the endosteum and inner cellular layer of the periosteum.

Mesenchymal stem cells (MSC), which differentiate into osteoblasts, are located in the endosteum and inner cellular layer of the periosteum.
MSC are adult stem cells found in the bone marrow, but also can be found isolated in other tissues including cord blood, peripheral blood, fallopian tube, and fetal liver and lung.

Processes above and be sure to mention the movement of electrons and energy as the carbon atom moves from one reaction to another.