The Fascinating World of Worms

The Physical Characteristics of Worms

Explanation: Worms, also known as annelids, are soft-bodied invertebrates that belong to the phylum Annelida. They have long, cylindrical bodies that are divided into segments. One of the distinguishing features of worms is the presence of bristles called setae on their bodies. These bristles provide support and help the worm move through its environment.

The setae are usually found on the ventral side of the worm, which is the underside of its body. The ventral side is the side that is in contact with the ground or surface the worm is moving on. The setae act like tiny legs, allowing the worm to grip the surface and move forward. They also help the worm maintain its shape and provide support.

On the other hand, the dorsal side of the worm, which is the upper side of its body, is typically smooth. This smoothness allows the worm to glide through its environment without any resistance. It also helps the worm avoid getting stuck or tangled in debris or obstacles.