Echinoderms

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

• tube feet

• sea star

• water vascular system

• endoskeleton

An echinoderm with five arms arranged around a center point.

• sea cucumber

• sea star

• sand dollar

• tube feet

An echinoderm with soft body and a leathery covering.

• sea star

• sand dollar

• sea urchin

• sea cucumber

Hollow thin walled tubes that each end in a suction cup

• tube feet

• tentacles

• sand dollar

• sea star

Hard framework inside the body used for support

• exoskeleton

• endoskeleton

• shell

• water vascular system

An echinoderm with fragile branched arms.

• sea star

• brittle star

• sea urchin

• sand dollar

Disk shaped animals covered with spines.

• sea stars

• brittle stars

• sand dollar

• sea cucumber

Echinoderms have no head or brain.

• True

• False

Most echinoderms have an open circulatory system.

• true

• false

Echinoderms have a hard exoskeleton.

• true

• false