Worms are soft, as they lack bones and have a soft body structure.
Understanding Worm Anatomy
According to the provided reference, worms have a soft body and no bones under their skin. Here's a closer look at their anatomy:
- Soft Body: The body of a worm is flexible and lacks a rigid internal skeleton.
- Segmented Structure: A worm's body is made up of many little rings, called segments, with grooves between them.
- Bristles for Movement: Each segment has tiny bristles that help the worm grip the soil, enabling movement.
Why are worms soft?
Unlike animals with bones, worms rely on their fluid-filled bodies for support. This fluid pressure, combined with their flexible body structure, gives them the soft texture we perceive.
Comparison with Other Animals
To understand why worms are soft, consider these comparisons:
- Animals with bones (vertebrates): These animals, like humans or dogs, have hard bones that provide a rigid frame and support.
- Animals with exoskeletons (arthropods): Creatures like insects have hard outer shells that protect and support their bodies.
- Worms: In contrast, worms have no internal or external hard structures, making them soft and pliable.
Key Takeaways
- Worms are soft because they lack a bony skeleton.
- Their body is made up of flexible segments.
- They use bristles for grip and movement.
