Vertebrates vs Invertebrates<br />By Brian Roby<br />
Getting the obvious out there…<br />The major difference between vertebrates and invertebrates is that vertebrates have a backbone and invertebrates do not.<br />
Categories of Animals<br />All vertebrates are under the classification “Chordates” <br />This is the only group that includes vertebrates<br />Humans are classified under this group<br />
Different Types of Vertebrates<br />Vertebrates are broken down into 5 different types<br />
Fish<br />Fish are categorized into 3 different types: Cartilginous(Including sharks and rays), Ray-finned(Salmon all the way to goldfish), and Lobe-finned(Lungfish and coelacanths) <br />
Mammals<br />Mammals are grouped into 3 different categories: Monotremes (Platypuses), Marsupials (Kangaroos, koalas, wallabies, and possums), and Placental Mammals (Primates and Humans!) <br />
Reptiles<br />The reptile group is very diverse and differs greatly from most of vertebrates because it is a ectothermal animal meaning that it must get it’s body heat from the sun and shade <br />The Reptile group includes animals such as snakes, lizards, crocodiles, alligators, and turtles. <br />
Amphibians <br />Amphibians live a very odd life. They actually change they’re form as they develop. They start as eggs and then transform into a fish life creature only to end up as a tetra pod (4 footed animal)<br />Amphibians include animals such as frogs, toads, and salamanders<br />
Birds<br />Birds are covered in feathers which enable them to fly making them one of the few vertebrates to be able to fly<br />Birds have over 9,700 species!!!!<br />
Different Types of Invertebrates<br />Invertebrates are broken down into 8 different categories <br />Again, invertebrates are any animal without a backbone <br />
Sponges<br />Sponges have no tissues or organs in their body<br />They’re filter feeders, meaning that they pump water through their pores to feed <br />There are 5,000 species of sponges! <br />
Cnidarians<br />Cnidarians are a very diverse group, this group includes jellyfish, sea anemones and coral.<br />These animals are incredibly dangerous to humans sometimes. <br />Some cnidarians, such as the Box Jellyfish, can kill a human with one simple sting.<br />
Flatworms<br />Flatworms include parasites which can harm humans and sometimes kill them<br />Flatworms include Tapeworms and Flukes<br />
Roundworms<br />Roundworms are found all over earth, including salt and fresh water! <br />There are over 90,000 species of roundworms, though the number is believed to be much higher<br />The most known species is of course the earthworm, which can be found anywhere dirt is<br />
Molluscs<br />Molluscs have three different types, Gastropods (Snails and slugs), Bivalve molluscus( Clams, scallops, and oysters) and Cephalopods(Octopuses and squids). <br />Most molluscs spend their lives living in a shell<br />There are over 43,700 species of molluscs<br />
Arthropods <br />Arthropods have 4 different groups that include Insects (Bee’s and flies), Arachnids (Spiders), Crustaceans (Crabs and Lobster), and Millipedes and centipedes<br />The lack of a backbone for this animal does not affect it at all because of the tough exoskeleton that is around all Arthropods <br />
Echinoderms<br />This class includes Sea Stars, Sea Urchins, and Sea cucumbers<br />This group is the closest related to Humans because of every member of the Echinoderms has radial symmetry just like humans do!! <br />
Works Cited <br />Bennett, Katie, and Laurel Hiebert. "Complex Life Cycles of Common Marine Invertebrates." Science Activities 46.4 (2010): 18-25. Academic Search Premier. EBSCO. Web. 22 Mar. 2011.<br />Hamner, William, and Michael, Dawson. "A review and synthesis on the systematics and evolution of jellyfish blooms: advantageous aggregations and adaptive assemblages." Hydrobiologia 616.1 (2008): 161-191. Academic Search Premier. EBSCO. Web. 22 Mar. 2011.<br />Hatchwell, Ben J. "Cryptic Kin Selection: Kin Structure in Vertebrate Populations and Opportunities for Kin-Directed Cooperation." Ethology 116.3 (2010): 203-216. Academic Search Premier. EBSCO. Web. 22 Mar. 2011.<br />IKEDA, YUZURU. "A perspective on the study of cognition and sociality of cephalopod mollusks, a group of intelligent marine invertebrates." Japanese Psychological Research 51.3 (2009): 146-153. Academic Search Premier. EBSCO. Web. 22 Mar. 2011.<br />Meinertzhagen, Ian A. "The organisation of invertebrate brains: cells, synapses and circuits." ActaZoologica 91.1 (2010): 64-71. Academic Search Premier. EBSCO. Web. 22 Mar. 2011.<br />Prokop, Pavol, MatejProkop, and Sue D. Tunnicliffe. "Effects of Keeping Animals as Pets on Children's Concepts of Vertebrates and Invertebrates." International Journal of Science Education 30.4 (2008): 431-449. Academic Search Premier. EBSCO. Web. 22 Mar. 2011.<br />
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