EVERYDAY SCIENCE

Detailed explanation-1: -The phylum includes earthworms, polychaete worms, and leeches. Annelids show protostomic development in embryonic stages and are often called “segmented worms” due to their key characteristic of metamerism, or true segmentation.

Detailed explanation-2: -The annelids include earthworms, polychaete worms, and leeches. All members of the group are to some extent segmented, in other words, made up of segments that are formed by subdivisions that partially transect the body cavity. Segmentation is also called metamerism.

Detailed explanation-3: -What are three segmented worms besides earthworms? Earthworms, leeches and lugworms are examples of annelids.

Detailed explanation-4: -The annelids /ˈænəlɪdz/ (Annelida /əˈnɛlɪdə/, from Latin anellus, “little ring"), also known as the segmented worms, are a large phylum, with over 22, 000 extant species including ragworms, earthworms, and leeches.

Detailed explanation-5: -Annelida segmentation is metameric, meaning their bodies are externally divided into similar segments by annuli. These segments are also divided internally by interior walls called septa .