Al-Amer, Abdul Aziz Salman2022-05-182022-05-182017721https://drepo.sdl.edu.sa/handle/20.500.14154/3906The present study was carried out to determine the residual levels of lead in blood, liver, kidney and muscles of young and old four animal species (camel, cattle, sheep and goat) in Riyadh area and around. A total number of two hundreds (200) slaughtered animals in Riyadh abattoirs were involved in this study as follows fifty camel, fifty cattle, fifty sheep and fifty goat. Blood and serum samples were collected for hematological and biochemical analysis as well as to estimate lead concentratioenThesis