PLATYHELMINTHES Description: Bilaterally symmetrical. Body having three layers of tissues with organs and organelles. Body contains no internal cavity. Possesses a blind gut (it has a mouth but no anus). Has Protonephridial excretory organs instead of an anus. Has a nervous system of longitudinal fibres rather than a net. Generally dorsoventrally flattened.
Examples 1. Fasciola hepatica - Common Liver Fluke