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