Diet and Digestive System
Nematodes are decomposers. Their digestive system is based on a hollow, one-way tube that runs through the center of their bodies. It eats bacteria cells, other worms, and decaying plants. Nematodes often infect humans and animals.
http://scienceblogs.com/zooillogix/Hookworm.jpg
This specie of nematodes has microscopic teeth.
