Schistosoma Mansoni
This blood fluke is a parasite of humans that causes intestinal diseases (schistosomiasis). It lives in the blood vessels and undergoes its final stage of reproduction in its definitive host humans (there are two sexes unlike most trematodes the class in which it is in). The nervous system of this and other flukes connects to a ganglia system that acts as a primitive brain, like most platyhelminthes. However unlike tape worms flukes have 3 pairs of length wise nerve cords that run the length of the body. |