How is a structure of a worm different from the structure of a sponge?

Worms have a more complex structure with a segmented body, a digestive system with a mouth and anus, and often a closed circulatory system, allowing for more efficient movement and nutrient processing. In contrast, sponges have a simple, porous body structure with no true tissues or organs; they rely on the flow of water through their bodies for feeding and respiration. While worms exhibit bilateral symmetry, sponges have an asymmetrical or radial symmetry. This fundamental difference in complexity reflects their distinct evolutionary paths and ecological roles.