blue sheet Echinoderms

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echinoderms

Sea stars, sea urchins, and sand dollars are _.

marine

Echinoderms are _ animals.

spiny skin, water vascular, tube

All echinoderms have _, a _ system, and _ feet. They also have an endoskeleton or internal skeleton.

five-part radial

Most adult echinoderms show _ symmetry/

deuterostomes

Echinoderms are _. This suggests that echinoderms and vertebrates are closely related.

external fertilization

Echinoderms reproduce by _.

water vascular system

Echinoderms have a system of internal tubes called a _.

The water vascular system is filled with fluid. It carries out vital body function, including respiration, circulation, and movement.

The water vascular system is filled with fluid. It carries out vital body function, including respiration, circulation, and movement.

madreporite

The echinoderm's water vascular system opens to the outside through a structure called a _/

ring canal

In sea stars, the madreporite connects to a _.

five radial canals, tube feet

In sea stars, the madreporite connects to a ring canal. From the ring canal, _ extend along body segments. Attached to each are hundreds of _.

tube foot

A _ works much like a suction cup. Most echinoderms move by using them.

Tube feet provide the main surface for respiration in many species of echinoderms. The water vascular system also functions to circulate materials though the echinoderm.

Tube feet provide the main surface for respiration in many species of echinoderms. The water vascular system also functions to circulate materials though the echinoderm.

oxygen, food, wastes

_, _, and _ are carried by the water vascular system.

capture floating plankton

Some echinoderms use their water vascular system to _.

sea urchins sand dollars, brittle stars, sea cucumbers, sea stars, sea lilies, feather stars

Classes of echinoderms include: _ and _, _, _, _, and _ and _.

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