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DOMINIQUE ANDERSON FEBUARY 10, 2008 INVERTEBRATES 4TH PERIOD MRS.BREG

ECHINODERMS:STARFISH AND FAMILY

  Echinoderms are marine animals that live in the ocean.They have arms or spines that radiate from the center of their body. The central body contains their organs,and their mouth for feeding. Sea stars commonly known as the starfish, 5 or more arms attached to their body. Sea urchins have many spines connected to their body. These spines help to protect them from predaturs. 

MOLLUSKS:Mollusks were among the first inhabitants of the earth.Fossils of mollusks have been found in rocks and date back over 500 million years.Mollusks fossilis are usually well preservend because of their hard shell. Most mollusks have a soft, skin like organ covered with an hard outside shell. Some mollusks live on land such as the snail and slug. Other mollusks live in water such as the oyster, mussel,clam,squid and octopus. Land living mollusks,like the snail move slowy on a flat sole called a foot.Ocean living mollusks move or swim by jet propulison.They propel themselves by ejcting water from their body. For example the squid ejects water from a cavity within its body, and the scallop ejects water to move by clamping its shell closed. Other ocean living mollusks, like the oyster, attach themslevels to to rocks or other surfes and cant move. They feed by filtering small food particles from water.

ARTHROPDS:CRUSTACEANS/:Crustaceans are type of Arthopod. The name may not sound familiar, but you probaly know them. Them you may even have eaten one. Crustaceans live mostly in the ocean or other waters. Most commonly knowen crustaceans are the crab, lobster and because of their hard shell.Most mollusks have a soft, skin like organ covered with a hard outside shell. some moullsks live on land, such as the snail and slug. Other mollusks live in water , such as oyster mussels. flat sole called a  foot. Oceah living  moullsks move or swim by jet propulsion.moullsks like the oyster attach them sleve to rock or other surfes that cant move.

                               BYE DOMINIQUE .S. ANDERSON
                               SCIENCE PROJECT ON INVERTEABLES
                                          SPONGE
                                        
                                           WORMS!!!!!!!!!!

                                          MOLLUSKS!!!!!!!!!!!

                                           ECHINODERMS!!!!!!!!!

                                            ARTHROPODS !!!!!!!