| Feeding flatworms extend a long pharynx out of their mouths. This tube leads directly into the digestive tract. |
| The medically important flatworms are further divided into the flukes and tapeworms. |
| Mitogenic rays, the midwife toad, and the flatworms that acquired memories through cannibalism share a chapter. |
| Figure 1 presents the results for the schistosomes, and differences between these and other parasitic flatworms are given below. |
| The initial studies involved little flatworms called planaria that have a very primitive nervous system. |
| The cestodes, or tapeworms, differ in a number of ways from other flatworms. |
