11. "' Osteoblasts "'are bone cells that are responsible for the formation of new bone. 12. That was " seeded " with bone cells , and eventually implanted onto the man's thumb. 13. For instance, blood stem cells have been changed into liver or bone cells or neurons. 14. There are even toxins that break down bone cells . 15. Another function of the skeletal system is to provide a method for bone cell maintenance. 16. Bone cells must attach themselves to something shortly after development and will die if they cannot.17. Chronic osteomyelitis may be due to the presence of intracellular bacteria ( inside bone cells ). 18. Bone cells create molecules made from proteins which are used to communicate with other bone cells . 19. Bone cells create molecules made from proteins which are used to communicate with other bone cells.20. Chung has been using bioreactors to study prostate tumors and their interaction with bone cells since 1995. 