Simple Invertebrates
Animals that don't have backbones.
What is an invertebrate?
An identical, or almost identical, repeating body part.
What is a SEGMENT?
A hard outer covering.
What is an EXOSKELETON?
The main mode of locomotion for echinoderms.
What are tube feet?
An example of a cnidarian
What is Portuguese man-o-war, jellyfish, soft corals, sea anemone, or cassiopea?
A concentrated mass of nerve cells controlled by the brain.
What is a nerve net?
This part of the mollusk creates the shell.
What is the mantle?
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?
Stinging-like cells in all cnidarians
What are nematocysts?
What are two body structures of porifera?
What is osculum (where water leaves) and ostia (pores).
A circulatory system that lacks veins or arteries
What is open circulatory system?
This process happens when an organism gets too big for its exoskeleton.
What is molting?
These two echinoderms can throw out their stomach or intestine.
What are sea stars and sea cucumbers?
The two body plans of cnidarians
What are medusa and polyp?
The four major classifications of Mollusks.
What are Gastropods, Cephalopods, Bivalves, and Polyplacophora?
What are the four classes of arthropods?
What are Insects, Arachnids, Crustaceans, and Myriapods?
The one characteristic that is unique to echinoderms and is a system of canals filled with fluid. Allows echinoderms to move.
What is a water vascular system?
The three classes of cnidarians
What are hydrozoa, anthozoa, and scyphozoa?
Animals with this digestive system eat food and excrete waste at the same area.
What is a two-way digestive system?
The four body parts of all Mollusks.
What are the FOOT (headfoot), VISCERAL MASS, MANTLE, and SHELL?
The three parts of an arthropods' body.
What are the HEAD, THORAX, and ABDOMEN?
The four types or classes of echinoderms.
What are sea urchins, sand dollars, sea stars, and sea cucumbers?
The two types of tissues found in cnidarians.
What is endoderm and ectoderm?