Nematoda

Nematodes are the round worms, that can be either parasidic or free-living, and live in great abundence in almost every place on earth. Nematodes have bilateral symmetry . Nematodes have no circulatory or respiratory systens so the use diffusion, the movement of matter, in this case gases, from and area or higher concentration to and area of lower concentration without the use of energy. Nematodes generally reproduce sexually, and produce eggs, the eccs hatch into larva which eventually become mature nematodes. A nematode's nervous system consists of two main nerves running paralell to the body of the worm with smaller nerves branching off.