Final answer:
The lophophore of bryozoans is separated from the rest of the trunk by a coelomic cavity, and it is a key feeding structure that distinguishes them within the Lophotrochozoa clade.
Step-by-step explanation:
The lophophore of bryozoans, which is a specialized feeding structure composed of ciliated tentacles encircling the mouth, is separated from the rest of the trunk by a coelomic cavity. This cavity is part of the internal organization of the zooid, which is the individual unit of the bryozoan colony. The zooid is protected by an external skeleton and has bilateral symmetry, even though the colony itself may appear asymmetrical. Bryozoans are part of the Lophotrochozoa clade, which includes organisms that either possess a lophophore or go through a trochophore larval stage. These unique structures are important to the classification of these animals and are key characteristics used to differentiate them from other groups within the animal kingdom.