How can some worms reproduce by splitting into two parts?

Some worms, particularly certain species of flatworms, can reproduce asexually by duplicating themselves through a process of pinching in two. Following this division, each half functions as a separate individual and regenerates the missing body parts to become a complete, new animal. This is a significant biological feat, especially for the posterior portion, which must regenerate major organs such as the brain, eyes, and pharynx.1

It is important to clarify that while some worms exhibit this regenerative reproduction, other types of worms, such as tapeworms, undergo a different process called strobilation. In strobilation, the worm produces a chain of segments called proglottids that separate from the parent; however, these segments are not regenerative themselves but instead serve to release eggs. Additionally, while many annelids possess impressive powers of regeneration, such as replacing lost tail segments, this is generally a response to injury rather than a primary method of whole-body reproduction.234