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What is the outer covering like for a echinoderm?
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.
What phylum has an internal calcareous skeleton?
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.
What are the adaptations of the horseshoe crab?
the way they hide from predators- like covering it self with sea grass
Howe do sea stars react to outside changes?
they use senses
What are the main characteristics and groups of echinoderms?
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.
What is an external skeleton and an internal skeleton?
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.
Does a sea horse have a endo skeleton exo skeleton or a hydrostatic skeleton?
It is endoskeleton. Seahorses have an interior skeleton.
Is the leatherback sea turtles skeleton on the inside or outside of its body?
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.
What animals are soft and have no skeleton at all or outside shell?
Some animals that are soft and have no skeleton or outside shell include jellyfish, slugs, and sea cucumbers. These animals rely on other structures or mechanisms for support and movement, such as hydrostatic pressure in jellyfish and muscular contractions in slugs.
Skeletal plates in starfish?
They make up the skeleton and protect internal structures.
What phylum contains sea stars?
Includes: Sea Stars, Sea Lillies, Sea Urchins, Sea Cucumbers, Brittle Stars
Do crab has scales?
Nope. A crab has a hard shell, known as an exoskeleton. That means skeleton on the outside. But no scales.
