The head of a planarian is rounded and shovel-like, with two eyespots (or ocelli) that detect variations in light, but do not convey visual data. The body is elongated, and has a pointy tail. It is also flattened and soft, since planaria have no bones.
Planaria do not have ears. Instead, they have earlike projections called auricles, which appear as rounded bulges at the posterior area of the head, on the left and right sides of the animal's body. The auricles contain chemoreceptors that detect chemicals (e.g., food), and are also thought to aid the animal in finding mates during cross-fertilization.
Planaria have the ability to regenerate their bodies. If you cut a planarian in two, both pieces will generate a new but genetically identical animal. In other words, they clone themselves. The cells of planaria are similar to stem cells; they can differentiate into any type of tissue, which allows these animals to regenerate organs and other body structures.