a camera for generating images of the cell over {HEAD ~ time} while {TAIL ~ the cell} remains in the container in the housing and maintained environment 
while
a camera for generating images of the cell over { HEAD ~ time } while { TAIL ~ the cell } remains in the container in the housing and maintained environment
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH