Necessity of enlargement of knowledge about biological effect of laser rays, possibility of their application in medicine and wide spread of different forms of hepatitis are the background for undertaking this study. Looking for new effective methods of treatment compels to pay attention to 632,8 nm laser rays created in 60th of 20 century. The first researches of biological effect of these laser rays' properties testified about stimulation of some functions in animal's organism [1,2]. These researches were allowed to undertake to study of He-Ne laser rays' influence on rat's liver with experimental hepatitis. Before some histologic and cytochemic investigations of He-Ne laser rays' influence on damaged liver were conducted [3,4,5,6].
The aim of this investigation is to determine morphological changes in cell, tissue, cytochemical quantitative changes in maintenance of total proteins, total nucleus acids in cell nucleus and cell cytoplasm, total glycogen in cell cytoplasm of rat's liver damaged by CCL4 before and after He-Ne laser treatment.