This book discusses studies that have been conducted on various animal species. The book reviews the effects of pesticides through changes in behavior, the nature of morphological and biochemical lesions, as well as the tracking of the metabolic disposition of pesticides in target sites of an organism. In vitro studies provide information regarding cellular responses and biochemical lesions with pesticides. Toxicological profiles of pesticides are cited using different species of animals for in vivo and in vitro studies. This information should help scientists and decision-makers reach conclusions regarding the toxicological effects of pesticides on humans and the environment.