SIMPLE INVERTEBRATES
An identical, or almost identical, repeating body part.
What is a SEGMENT?
A hard outer covering.
What is an EXOSKELETON?
A hard and bony or stiff and flexible internal skeleton.
What is an ENDOSKELTON?
Seastars fall under this phylum.
What is echinoderms?
An organism that invades and feeds on the body of another living organism, or host.
What is a PARASITE?
The most familiar annelid worm.
What is an EARTHWORM?
An eye that is made up of many identical, light-sensitive units.
What is a COMPOUND EYE?
Meaning "spiny skinned" due to spines on the animals skeleton.
What is an ECHINODERM?
The two types of circulatory systems in Mollusks.
What are open and closed circulatory systems?
An echinoderm that had bilateral symmetry as a larva and redial symmetry as and adult.
What is a SEA URCHIN?
The three major classifications of Mollusks.
What are GASTROPODS, BIVALVES and CEPHALOPODS?
The three parts of an insects body.
What are the HEAD, THORAX, and ABDOMEN?
The one characteristic that is unique to echinoderms and is a system of canals filled with fluid.
What is a WATER VASCULAR SYSTEM?
A concentrated mass of nerve cells controlled by the brain.
What is a GANGLION?
The four body parts of all Mollusks.
What are the FOOT (headfoot), VISCERAL MASS, MANTLE, and SHELL?
Changing form as an organism develops.
What is METAMORPHOSIS?
The amount of major classes of Echinoderms.
What are the FIVE MAJOR CLASSES of echinoderms?