Simple Invertebrates
Mollusks and Annelid Worms
Arthropods
Echinoderms
Kinds of Cnidarians
100
Animals without backbones
What is invertebrates
100
A simple heart pumps blood through blood vessels that empty into sinuses.
What is an open circulatory system.
100
A hard, external, supporting structure of Arthropods.
What is an exoskeleton.
100
What does the word echinoderm mean.
What is "spiny skinned".
100
The three body plans of invertebrates.
What are bilateral symmetry, radial symmetry, and asymmetrical.
200
Radial symmetry, Bilateral symmetry, asymmetrical.
What are the 3 body plans in invertebrates.j
200
The gills, gut, and other organs form this, it lies in the center of a mollusk's body.
What is visceral mass.
200
The head, thorax, and abdomen make up_____.
What is an arthropo.
200
Sea stars, sea urchins, and sand dollars come from what type of invertebrates.
What is an echinoderm.
200
Hydrozoan, jellyfish, sea anemone, and coral are all classified as _______.
What are cnidarians.
300
A pouch lined with cells that release chemicals that break down food.
What is the gut.
300
An identical or almost identical repeating body part.
What is a segment.
300
This is made up of many identical light sensitive units.
What is a compound eye.
300
A radial nerve.
What is a nerve that controls the movement of a sea star's arm.
400
A body cavity that surrounds the gut, contains internal organs.
What is the coelom.
400
This word means "many bristles."
What is polychaetes.
400
This animal goes through incomplete metamorphosis.
What is a grasshopper or cockroach
400
A star that is related closely to the sea star.
What is a brittle star.
400
Hydrozoans live most of there life as a ______.
What is a polyp.
500
This invertebrate sucks in water through its pores.
What is a sponge.
500
This worm has 100 to 175 segments.
What is an earthworm.
500
It consists of the stages: egg, nymph, and adult.
What is incomplete metamorphosis.
500
An invertebrate that has a soft leathery body, and have a worm like shape.
What is a sea cucumber.
500
Coral makes its skeletons out of _____.
What is calcium carbonate.
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