Roundworm
Roundworms are parasites that infect people, they are usually found in the intestines. They round from 1 millimeter to over 1 meter!! The body of the roundworm is long and narrow, looks like a thread. The outer layer of skin is composed of cellular material and nuclei spread out, over the whole epidermis of the worm. The epidermis gives out this thick outer cuticle and gives the worm a tough and flexible body. The long muscles along the inside of the worm allow it move from side to sides.