Comparative study to the morphological characters and histological composition of the Clitellum in the Lumbricus terrestris Linnaeus, 1758

Abstract

the study of morphological and histological characteristics to the Clitellum in Lumbricus terrestris ,it found to be located in segment (32-37) and be episodes where overgrown, prominent and distinct, lighter in color than the rest of the body color, while you can not distinguish this region in immature .it is found that the histological region consists of four layers are cuticle , epidermis layer , the circular muscle layer and longitudinal muscle layer also found that the Clitellum area is swelling caused by an increase in the layers and the number of epithelial cells of the epidermis layer and most of those secretory cells .