Earthworm, a long, slender worm. It is found in damp soils of regions having moderate or warm climates. See more »

Hookworm, a roundworm that lives as a parasite in the intestines of man and other animals. See more »

Planarian, any of several free-living (nonparasitic) worms. The planarian is the simplest of all flatworms. See more »

Tapeworm, a parasitic flat worm. The tapeworm has a long, flat body made up of a head, a neck, and a chain of segments, or sections. See more »

Worm, an animal that has a soft, long body, typically with no legs. A worm is an invertebrate, an animal without a backbone. See more »

Annelid, a member of a large phylum of worms, most of whose members have segmented, tubular bodies. See more »

Ascaris, a genus of parasitic roundworms. Members of this genus are widely distributed, and are especially numerous in warm, moist climates. See more »

Eelworm, a common name for a free-living (that is, nonparasitic) or plant-parasitic roundworm. See more »

Flatworm, a worm with a soft, flat body. Some flatworms live in water, chiefly in the sea, but most are parasites that live in the bodies of other animals. See more »

Fluke, a flatworm that lives on or in other animals. Some flukes live on a single host. See more »