{TAIL ~ Tissue} is imaged by a microscope capable of imaging sections of the tissue below the exposed tissue surface through {HEAD ~ optics} 
{ TAIL ~ Tissue } is imaged by a microscope capable of imaging sections of the tissue below the exposed tissue surface through { HEAD ~ optics }
TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD