STUDIES ON THE SECRETORY-EXCRETORY SYSTEM OF NEMATODES: A REVIEW

Abstract

A considerable variability occurs in the structure of the excretory system of nematodes. In animal-parasitic nematodes the morphology of the excretory organs is different among the larval and adult stages of the same species. Two types of excretory system were found in case of nematodes, namely glandular and tubular. These types have several modifications. Structure of the excretory glands, lateral canals and excretory sinus along with modification of different parts in various nematode species was studied by different workers. These workers have critically assessed the morphology, histology and histochemistry of different parts of excretory system and their probable role in excretion among different nematode species. The present paper reviews the research work carried on the excretory system of nematodes.