What type of skeleton do earthworms utilize for structure and movement, in contrast to caecilians?

Answer

A hydrostatic skeleton

Earthworms rely on a hydrostatic skeleton—a fluid-filled cavity against which muscles contract—for their peristaltic movement.

What type of skeleton do earthworms utilize for structure and movement, in contrast to caecilians?

#Videos

Caecilian facts: they're amphibians! | Animal Fact Files - YouTube

taxonomyamphibianwormtetrapodCaecilian