الفهرس 
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Abstract
Environmental pollution is one of the most pressing problems which has seriously emerged nowadays in the modem world.
In this concern, lead is considered as one of the most hazardous
chemicals- not onlv.
to human bein!rs- but also to the whole
environment in general.
Therefore, the present work was planned to illustrate and evaluate the hazardous impacts of lead (in the form of lead acetate) on certain tissues and organs of one of the mammalian representations, the white rat, Rattus norvegicus. The selected targets comprised the blood, liver, kidneys and part of the nervous system nameIy, the spinal ganglia.
For this purpose, 200 rats were used in the present study. The LD50 of the used chemical lead acetate was to be firstly determined using 110 rats and was found as 403.6 mg!kg b.wt. Three varieties
of treatments were applied in the present experiments.
Environmental pollution is one of the most pressing problems which has seriously emerged nowadays in the modem world.
In this concern, lead is considered as one of the most hazardous
chemicals- not onlv.
to human bein!rs- but also to the whole
environment in general.
Therefore, the present work was planned to illustrate and evaluate the hazardous impacts of lead (in the form of lead acetate) on certain tissues and organs of one of the mammalian representations, the white rat, Rattus norvegicus. The selected targets comprised the blood, liver, kidneys and part of the nervous system nameIy, the spinal ganglia.
For this purpose, 200 rats were used in the present study. The LD50 of the used chemical lead acetate was to be firstly determined using 110 rats and was found as 403.6 mg!kg b.wt. Three varieties
of treatments were applied in the present experiments.