The structures of bone are useful for providing {HEAD ~ living cells} and tissues as well as biologically active molecules to {TAIL ~ subjects} 
The structures of bone are useful for providing { HEAD ~ living cells } and tissues as well as biologically active molecules to { TAIL ~ subjects }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL