repeating identical or nearly identical part

structure inside the body that digests food and absorbs nutrients

protects and supports an animal from the outside of its body

structure that supports the body of an animal from the inside of the body

body cavity that surrounds the gut of an animal

pumps and canals that help echinoderms move, breathe, and eat

Echinoderms have a nervous system that is similar to jellyfish nervous systems.

Echinoderms have radial symmetry at larvae and bilateral symmetry as adults.

Echinoderms’ spines grow from their skin.

Which of the following structures would help an earthworm move?

What does regeneration do for a sponge?

Which of these is a class of cnidarian?

A piece of spaghetti would best relate to which category of invertebrates

How could you tell that an earthworm does not belong in the roundworm category?

A system in which blood pumps through blood vessels that empty into sinuses

A system in which pumps blood through a network of blood vessels that form a loop that only contains blood.

Which of the following is a unique characteristic of most arthropods?

How can you tell a centipede from a millipede?

What separates crustaceans from other arthropods?

What is an easy way to tell if you have an animal is an arachnid or an insect?

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