Effect Of Tanery Sludge On Gut Region Of Earthworm, Eisenia Foetida

The histological effect of chromium on the body tissues of the earthworm, Eiseniafoetida was determined by light microscopy. The earthworms were exposed to crushed tannery sludge up to 30 days in different concentrations. Histology of the foregut of E. foetida showed changes in circular muscles, a detachment of the peritoneum from longitudinal muscles in the foregut. In some areas of the midgut, the cuticle, the intestinal wall was found damaged with complete eradication of peritoneum. In hindgut, the damage was observed in epidermis, circular muscles, longitudinal muscle showed signs of cracks in major parts of the region. Further, the intestinal epithelium was injured beyond recognition.