NEET BIOLOGY

Detailed explanation-1: -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-2: -Annelids are often called “segmented worms” because they possess true segmentation of their bodies, with both internal and external morphological features repeated in each body segment.

Detailed explanation-3: -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 .

Detailed explanation-4: -Annelids display bilateral symmetry and are worm-like in overall morphology. Annelids have a segmented body plan wherein the internal and external morphological features are repeated in each body segment.