Echinodermata/Arthropoda

Sea stars belong to what Phylum?

• Invertebrata

• Arthropoda

• Nematoda

• Echinodermata

Instead of a brain, sea stars have a _______________.

• Radial canal

• Nerve ring

• Heart

• Straw

Tags

NGSS.MS-LS4-2

A network of water filled canals with thousands of tubes connected to it.

• tube feet

• sea star

• water vascular system

• endoskeleton

How does an echinoderm use its water vascular system?

• To move and capture food

• To sense when food is near

• To defend itself against predators

What type of symmetry do echinoderms have?

• None

• Radial symmetry

• Bilateral symmetry

Sea stars move by using:

• Arms

• Tube feet

• Ocean currents

Echinoderms have no head or brain.

• True

• False

Tags

NGSS.MS-LS4-2

What two echinoderms are able to regenerate?

• Sand dollar and sea urchin

• brittle star and sea star

What type of circulatory system do arthropods have?

• open

• closed

Which of the following crayfish structures is used for gas exchange?

• Malpighian tubules

• Green glands

• Gills

• Book lungs