Nematoda
Overview
Known as Nematodes or round worms this specific phylum consists of a diverse array of different organisms. This phylum; in fact, has the most diverse animal phyla as about 28,000 species can be identified and almost 1 million species are estimated to exist. The habitats of this phylum range from mountains to the ocean floor and nematodes are also noted to be one of the most widespread phyla in terms of habitat. Nematodes are mostly characterized as microscopic organisms that are sometimes known to be parasitic.
Nematode Excretory System
The Nematode excretory system works in a manner similar somewhat to other organisms. Nematodes secrete nitrogenous waste in the form of ammonia from pores and openings in their bodies. Though there is no specific organ for ridding the body waste there are structures for removing salt. In some Nematodes there are two parallel ducts that converge into a single transverse duct which leads into a common canal and finally an excretory pore. This form of excretion is more widely seen among organisms and similarities can be seen among them.