الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
This study was done to investigate the effects of UV radiation on Ultrastructure of rat’s liver tissue, the concentration of some trace elements and the changes in the complete blood count with four experimental groups (control, 8, 16 and 24 days) 8hours per day. Even though the harmful effects of UVC radiation, which is one of the main components of the radiation from the sun, is more than UVA and UVB radiation, the environmental effects of this kind of radiation have been studied less, resulted that show round nucleus with differentiated heterochromatic ,euchromatic , dense bodies was present in nuclear matrix N, the hepatocytes was lighted under the degenerative of its organelles accumulation of rough endoplasmic reticulum RER with shorted road, long &small size of lysosomes Ly, lipid droplets L, swollen of mitochondria M and area of microsomal membrane mi. and significant changes in liver enzymes and huge significant increase in some trace elements beside there were changes in hematological parameters all of these changes indicated that there was a relation between the changes and biochemical events in the hepatocytes during the radiation exposure. These results indicated that the longer exposure to UVR would cause more ultrastructural effects on the cells and more changes for liver enzymes and some elements. Further studies about the abnormalities and their relations to radiation injury are in progress.