Phylum Nematoda, derived from the Greek word “Nema” for thread and “Eidos” for form, can be found in nearly every habitat including as parasites in plants and animals. They are bilaterally symmetrical and have two cell layers, tissues, and organs. Their bodies are long and narrow like a tiny thread. Their skin is composed of cells and is a mass of cellular material and nuclei without separate membranes. Nematodes have a cuticle that is both tough and flexible. This is the closest thing they have to a skeleton and they use it as support and leverage point for movement. They have long muscles that lie just underneath the epidermis. The muscles are all aligned longitudinally along the inside of the body so the nematode can bend its body side to side not crawl or lift itself up.