Echinoderms

Which echinoderm is this?

• sea lily 

• sea urchin 

• sea cucumber 

• sand dollar 

What does the Greek word echinoderm actually mean?

• tube feet

• star shaped

• spiny skin

• stomach foot

Echinoderms move around using a hydraulic system of fluid-filled tube feet called the

• water vascular system

• nervous system

• notochord

• ampulla

Sea stars feed by

• Injecting poison that digests the prey

• pushing their stomach into their prey to digest the prey in its own shell

• Chewing their prey with jaws and teeth

• squeezing their prey until it dies

The nerves that run down each arm of a starfish are the _____

• nerve ring

• stone nerve

• radial canals

• ampulla

What type of skeleton do echinoderms have?

• Exoskeleton
• Hydrostatic skeleton
• Endoskeleton
• Mesenteric skeleton

This echinoderm has five arms arranged around a center point.

• sea cucumber

• sea star

• sand dollar

• sea urchin

Echinoderms have no head or brain.

• True

• False

Tags

NGSS.MS-LS4-2

Sea Star's favorite prey are...

• Crayfish

• Humans

• Fish

• Mollusks

What type of symmetry do adult echinoderms exhibit?

• Asymmetry
• Radial symmetry
• Bilateral symmetry
• Trilateral symmetry