More than 15,000 species of annelids exist, including earthworms, leeches and polychaetes, which include fireworms, clam worms, lugworms and bristleworms. Earthworms are probably the most commonly known type of annelids; there are more than 2,700 species of earthworms, with the longest species capable of growing up to 22 feet long.Continue Reading
All species that belong to the phylum Annelida are invertebrate worms with segmented bodies, which allow them to be incredibly flexible and mobile. The majority of annelids tend to live in either soil or freshwater, although there are a few species that live on, rather than in, the ground.
The digestive system of annelids consists of a single tube that runs the length of the worm, with the mouth at one end and the anus at the other. Most annelids feed by passing soil through their bodies, absorbing nutrients from microscopic organisms in the soil. However, there are also parasitic annelids that feed off of a host organism, with blood-sucking leeches being the most common example.
Earthworms exist in huge numbers all around the world in virtually any soil that isn't frozen. It has been estimated that one acre of soil typically contains as many as 1 million of them.Learn more about Worms
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.Full Answer >
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 by fisherman, and smaller redworms used to feed aquarium fish and leeches.Full Answer >
Annelids eat with a mouth that is located on the underside of the head. The mouth connects to an unsegmented gut that runs the length of the worm. The gut terminates at the anus, located at in the pygidium area at the end of the worm.Full Answer >
Freshwater leeches live everywhere in the world except Antarctica, and marine leeches live in all the oceans. Most leeches are found in fresh water, such as streams, rivers, ponds and marshes, but some species thrive in salt water. Some live on land in moist, muddy areas.Full Answer >