Unit 10 Echinoderms

What echinoderm is this?

• sea lily 
• sea urchin 
• sea cucumber 
• sand dollar 

What echinoderm is this? 

• sand dollar
• sea urchin 
• sea star
• brittle star

What does the term echinoderm mean?

• tube feet
• star shaped
• spiny skin
• stomach foot

What type of symmetry do adult echinoderms exhibit?

• Asymmetry
• 5-part radial symmetry

• Bilateral symmetry
• Trilateral symmetry

The larva of echinoderms have _____ symmetry.

• Asymmetrical
• Bilateral
• Radial
• None

Echinoderms have an internal skeleton and a system of fluid-filled tubes called a(n)...

• water vascular system
• nervous system
• notochord
• ampulla

Sea stars feed by

• Injecting poison that digests the prey 
• Everting their stomach to digest prey
• Chewing their prey with jaws and teeth
• squeezing their prey until it dies

The nerve that runs down each arm of a starfish is the _____

• nerve ring
• stone nerve
• radial nerve
• ampulla

These structures resemble long suction cups, and are part of the water vascular system.

• madreporite

• radial canals

• tube feet

• ampullae

This structure is responsible for moving water in and out of the water vascular system.

• ampullae

• madreporite

• ring canal

• radial canals