Will Annelids Have Endoskeleton?

There are three types of skeletons: the endoskeleton, the exoskeleton and the hydrostatic skeleton. Most cnidarians, flatworms, nematodes and annelids have a hydrostatic skeleton that consists of fluid held under pressure in a closed body compartment.

Does annelida have exoskeleton?

The exoskeleton is composed of a thin, outer protein layer, the epicuticle, and a thick, inner, chitin-protein layer, the procuticle. ... Annelids have a thin chitinous cuticle covering their bodies but it is not as well developed as in arthropods.

What animals have an endoskeleton?

Mammals, reptiles, birds, fish and amphibians are vertebrates with endoskeletons (skeletons inside their bodies). Their skeletons provide support and protection and help them to move. Insects, spiders and shellfish are some of the invertebrates that have exoskeletons.