METAMERISM Definition: Metameric segmentation or metamerism is an architectural body plan in some animals in which the similar body segments called metameres or somites are serially repeated one after another. The animals which exhibit such features called metamerically segmented. Metamerism in Annelids Metamerism is a key structural feature observed in annelids, where the body is divided into a series of repeating segments called metameres or somites. This segmented organization is a hallmark of the phylum Annelida, which includes earthworms, leeches, and polychaetes. Each segment typically contains a repetition of organs and structures such as muscles, nerves, blood vessels, and excretory units, though some functional specialization can occur. Metamerism is a type of structural isomerism in which compounds have the same molecular formula and functional group but different alkyl chains. Learn the concept of metamerism with examples of ethers and amines from Vedantu, a live online learning platform. Metamerism is a body plan in which the body segments and organ systems are repeated serially. Learn about the occurrence, features, types and origin of metamerism in annelids, arthropods, chordates and cestodes.
