i pokes out
The skeleton is on the outside of a sea star they on the type of echinoderm. In Sea Stars and brittle stars the skeleton is small ossicles that move together creating flexible joints.
The phylum Echinodermata has an internal calcareous skeleton made up of plates or ossicles. This skeleton provides support and protection for organisms in this phylum, such as sea stars and sea urchins.
the way they hide from predators- like covering it self with sea grass
they use senses
Echinoderms are invertebrates with an internal skeleton and a system of fluid-filled tubes called a water vascular system. There are four major groups of echinoderms: sea stars, brittle stars, sea urchins, and sea cucumbers.
Skeletons:All animals, including humans have skeletons. Humans have an internal skeleton. This means that our bones is on the inside of us. When an animal has an external skeleton it means that their skeleton is on the outside. These animals who have an external skeleton have what we commonly call shells. These shells are their skeleton which keeps their insides together. If you think of one of those big crabs and how there is a shell on the outside of them (not sea shells) this is their skeleton which is an external skeleton.
It is endoskeleton. Seahorses have an interior skeleton.
It is both. A turtle's skeleton includes the carapace (shell) but also is comprised of a spine and other joints (shoulder, hips, knees, etc) inside the body.
They make up the skeleton and protect internal structures.
Includes: Sea Stars, Sea Lillies, Sea Urchins, Sea Cucumbers, Brittle Stars
Nope. A crab has a hard shell, known as an exoskeleton. That means skeleton on the outside. But no scales.
sea stars have NO brains