EVERYDAY SCIENCE

Detailed explanation-1: -Their body is segmented i.e. it is divided into almost 100 to 120 small ring-like segments. It is known as true segmentation, i.e. the division is not just external, but the internal body of the earthworm is also segmented by membranous divisions called septa.

Detailed explanation-2: -The segments are separated from each other by septa (the plural of “septum") which are perforated transverse walls, allowing the coelomic fluid to pass between segments.

Detailed explanation-3: -Earthworms’ bodies are made up of ring-like segments called annuli. These segments are covered in setae, or small bristles, which the worm uses to move and burrow.

Detailed explanation-4: -Annelids are segmented worms with a tubular body and a specialized digestive system with a terminal mouth and an anus. Their body cavity has thin transverse septa that delineate the segments. They generally reproduce sexually by cross-fertilization and are often hermaphroditic, but many reproduce asexually by budding.