these observations led to this comparative study on several morphological , histochemical and biochemical parameters on mature ferrets , dogs and cats including : ( 1 ) the number of center tapetum cell layers , ( 2 ) thickness of center tapetum , ( 3 ) presence of a microtubule-like structure in each tapetal rod , ( 4 ) presence of electron-dense cores in tapetal rods after prolonged fixation in glutaraldehyde , ( 5 ) retention of reflection or color of tapetum after prolonged glutaraldehyde fixation , ( 6 ) zygomatic bones of eye orbits , ( 7 ) zinc content in tapetum , ( 8 ) cysteine in the tapetum , ( 9 ) cysteine sulfinic acid decarboxylase in liver , ( 10 ) thickness of retina from center tapetum , ( 11 ) anterior view of skull configuration , and ( 12 ) lateral view of skull configuration ( jaw and teeth ) .
C0015392
eye
C0035298
retina