Annelids are any of the roughly 9,000 segmented worms that make up the Phylum Annelida. Only a few species are known to the average person. These include dew, rain and earthworms commonly found in the soil, lugworms used... More » Pets & Animals Bugs Worms

The main difference between annelids and all other types of worms is that annelids have segmented bodies. Annelids also have a coelom, which is basically another tube inside the body that is filled with fluid and contain... More »

There are two sets of muscles that help annelids move. One expands, and the other contracts the body. Annelids alternate the use of these muscles to achieve locomotion. More »

Annelids live all over the world in all types of ecosystems, preferring to burrow in soil, sand or sediment both on land and in the ocean. An estimated 17,000 species of annelids are known to exist worldwide. More »

Annelids, or segmented worms, are important because some of them aerate and enrich soil, which keeps it fertile. Medicinal leeches are annelids that are used in healing. More »

Earthworms are tube-shaped, segmented worms found living in soil, where they feed on organic matter. An earthworm's digestive tract is laid out straight from the oral orifice to the anus. The parts of the digestive tract... More »

Sea mice, rag worms, bloodworms, palolo worms and lugworms are types of annelids in the Polychaeta class. Other annelids include earthworms, class Oligochaeta, and leeches, class Hirudinea. Annelids are named for their s... More » Pets & Animals Bugs Worms