The annelids (/ ˈænəlɪdz /), also known as the segmented worms, are animals that comprise the phylum Annelida (/ əˈnɛlɪdə /; from Latin anellus 'little ring'). [4][a] The phylum contains over 22,000 extant …

Dec 16, 2025 · annelid, any member of a phylum of invertebrate animals that are characterized by the possession of a body cavity (or coelom), movable bristles (or setae), and a body divided into …

Nov 5, 2025 · Annelids, commonly known as segmented worms, are soft-bodied, bilaterally symmetrical invertebrates of the phylum Annelida. They constitute the earthworms, leeches, and ragworms, …

Members of the Phylum Annelida can be found throughout the world, in marine, freshwater, and terrestrial environments. Ecologically, they range from passive filter feeders to voracious and active …

Jun 23, 2025 · The phylum Annelida represents a vast group of invertebrate animals, commonly known as segmented worms. With over 22,000 known species, these creatures have adapted to nearly …

Phylum Annelida includes segmented worms. These animals are found in marine, terrestrial, and freshwater habitats, but a presence of water or humidity is a critical factor for their survival, especially …

Aug 3, 2023 · About 8,700 known species of Annelida are divided into four main classes, primarily on the basis of presence and absence of parapodia, setae, metameres, and other morphological features.

Segmented worms make up the Phylum Annelida. The phylum includes earthworms and their relatives, leeches, and a large number of mostly marine worms known as polychaetes.

Dec 16, 2025 · The body of an annelid is often described as a tube within a tube. The inner tube, or digestive tract, is separated from the outer tube, or body wall, by the coelom. The head region …

Phylum Annelida comprises the true, segmented worms. These animals are found in marine, terrestrial, and freshwater habitats, but the presence of water or humidity is a critical factor for their survival in …