Liver fluke (Fasciola hepatica)
- The body of an organism is divided into two equal right and left halves by cutting it only on the median axis or long axis of the animal.
- In animals with bilateral symmetry organs are well-developed.
- In them, the coelomic cavity may be either absent or well-developed.
- Dorsiventrally flattened means the front and back of the organism are flat.
- These two features are present in the organisms belonging to group Platyhelminthes. Liver fluke is one of the examples of group Platyhelminthes.