Marine Invertebrates

Front

What is an invertebrate?

Back

An animal with no backbone.

Front

What is a water vascular system?

Back

A network of water-filled canals with thousands of tubes connected to it, used for movement and feeding in echinoderms.

Front

What type of symmetry do animals with bilateral symmetry exhibit?

Back

They can be divided into two identical halves along one plane.

Front

What are the two body forms of a cnidarian?

Back

Polyp and medusa.

Front

What are tube feet?

Back

Hollow thin-walled tubes that each end in a suction cup, used for movement and feeding in echinoderms.

Front

What is radial symmetry?

Back

A body plan in which body parts are arranged around a central axis, like a wheel.

Front

What is bilateral symmetry?

Back

A body plan in which the left and right sides of the body are mirror images.

Front

What is a polyp?

Back

A cylindrical body form of a cnidarian that is usually sessile and has tentacles at the top.

Front

What is a medusa?

Back

A free-swimming body form of a cnidarian that is bell-shaped and has tentacles hanging down.

Front

What is an example of a marine invertebrate?

Back

Sea star, jellyfish, octopus, and sea urchin.