Does the Rotifer Exhibit Cephalization?

Flatworms are highly cephalized; they are the first animal we look at in lab that actually looks back. Cephalization is a characteristic of all bilaterally symmetric animals. ... Flatworms, nematodes and rotifers are protostomes, the first opening in the ball of embryonic cells becomes the mouth.

What Phylums have cephalization?

Members of the Phylum Platyhelminthes (particularly planarians, Class Turbellaria) have brain and sense organs in front of the animal. This is known as cephalization. The sense organs are the first to make contact with the environment in cephalized animals.

Are sea stars cephalized?

Echinoderms, or sea stars, also lack cephalization. Nearly all animals not falling into one of these categories exhibits some degree of cephalization.