Title: Nematoda - Nematodes - Roundworms - Animalia
Headings: Nematoda - Nematodes
Nematoda - Nematodes - Round Worms
Typical Nematodes
Other Nematodes

Content: Ascaris lumbricoides
Typically 15 to 35cm in length, these are an intestinal parasite of humans
Elephantiasis, a result of a parasitic infection of filarial nematodes. The nematodes that cause this are microscopic and cause a blockage of the lymphatic system and so fluid retention with tissue and skin thickening. The legs and genitals are particularly affected, the scrotum can swell to the size of a basketball in some unfortunate individuals. Ancylostoma caninum - a hookworm
attached to the intestine of a dog, though species of hookworm infect other mammals including humans. The name comes from them being bent over at the head end so forming a hook. Nematode infestation in the vomit of a cat
(yes I know it's gruesome, but nematodes are like that)
picture - Kalumet at de.wikipedia, published under GNU Free Documentation License, Version 1.2
Kingdom - Animalia
Phylum - Nematodes
Basic Features: Roundworms get their name from their round cross section. Long thread-like bodies. Usually very small to microscopic, some parasitic members however may be a metre long. Simple tube-like gut with a mouth and anus.