No, worms do not have bones.
Worms belong to a group of invertebrates, meaning they lack a skeletal system made of bone or cartilage. Instead of bones, worms rely on a hydrostatic skeleton for support and movement. This hydrostatic skeleton involves fluid-filled cavities within their body that are surrounded by muscles. By contracting these muscles, the worm can change the shape and pressure within these cavities, allowing it to move and maintain its structure.
Here's a breakdown:
- Invertebrates: Worms are invertebrates, organisms lacking a backbone or internal skeleton of bone.
- Hydrostatic Skeleton: Worms utilize a hydrostatic skeleton which is essentially fluid pressure within their body segments to provide support and enable movement.
- Segmentation: A worm's body is made up of repeating segments, each containing tiny bristles (setae) to grip the soil. These segments work in coordination with the hydrostatic skeleton for locomotion.
Therefore, a worm's soft body and lack of any internal bony structure confirm that they do not possess bones.
