Worms belong to the phylum Annelida, which is a group of segmented worms. There are many different types of worms, such as earthworms, marine worms, and leeches, each classified within this phylum. Annelids are known for their long, cylindrical bodies that are divided into segments, which help in movement and function.
Within the phylum Annelida, worms are further categorized into several classes, including:
- Oligochaeta – This class includes earthworms and freshwater worms. They typically have a reduced number of bristles and are found in moist environments.
- Polychaeta – This class consists of marine worms characterized by having many bristles, or parapodia, on each segment, which assists in movement and respiration.
- Hirudinea – This class includes leeches, which are known for their flattened bodies and can be found in both freshwater and terrestrial environments.
Overall, while worms are simple organisms, their classification reflects a diverse group found in various habitats across the globe.