EVERYDAY SCIENCE

Detailed explanation-1: -Phylum Annelida contains the class Polychaeta (the polychaetes) and the class Oligochaeta (the earthworms, leeches, and their relatives).

Detailed explanation-2: -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.

Detailed explanation-3: -The phylum Annelida includes earthworms, polychaete worms, oligochaetes, and leeches. Worms in this phylum are primarily characterized by having segmented bodies (some worms have more conspicuous segments than others).

Detailed explanation-4: -The term Earthworm refers to a specific group of invertebrates within the taxonomic phylum Annelida. Earthworms belong to the Oligochaetes-which means ‘few bristles’ and are represented by 31 species of earthworm here in the British Isles.

Detailed explanation-5: -An earthworm is a terrestrial invertebrate that belongs to the phylum Annelida. They exhibit a tube-within-a-tube body plan; they are externally segmented with corresponding internal segmentation; and they usually have setae on all segments.