Movement In Earthworm An earthworm is an invertebrate. It has a long, tube-like body. It has no bones. Its body shape is maintained by the fluid present inside its body. This kind of skeleton is called a liquid skeleton.An earthworm’s body is made up of several parts called segments.It moves by lengthening and shortening these segments. It extends the front part of the … [Read more...] about How Does An Earthworm Move