Its life cycle begins as a free-swimming larva, which then goes through several life stages before settling and transforming into an adult worm, with a simple, segmented body structure—a head ...

A worm is a long, creeping animal, with a soft, often segmented body. They don't have legs but instead are covered in hairs or bristles that help them to move. They breathe through their skin ...

repeated pattern underlay the differing body structures of animals. It could be seen in the segmented bodies of worms, in the vertebrae of animals with backbones, in the head-thorax-abdomen ...

There are at least 20,000 different species, but the main three types include flatworms, roundworms and segmented worms, according to Britannica. The earthworm, the worms you commonly see after it ...