Roundworms

roundworms that belong to phylum nematode have a digestive system and contain 2 openings a mouth and anus. they are carnivores that feed on tiny animals, some eat algae, fungi, or rotting organic matter. roundworms breathe and excrete metabolic wastes through their body walls. they have simple nervous systems that is made up of ganglia in the head region although they do not have a real brain. roundworms reproduce sexually, and few are hermaphroditic, fertilization occurs inside the female. Fliarial worms are thread like worms found in blood and lymph vessels of birds and mammals.