What is the segmentation of planarian?

Planarians exhibit a form of segmentation known as "metamerism," but it is not as pronounced as in more complex organisms like annelids. Instead of distinct segments, planarians have a body that can be divided into regions, such as the head, trunk, and tail, which can regenerate. Their body plan is more simplified, with a flat, bilaterally symmetrical structure that allows for efficient movement and nutrient absorption. While they do not have true segments, their body organization allows for various specialized functions.