Discovering Animal Classification: Vertebrates and Invertebrates

1. Animal Classification

2. Animals • Animals are spilt into two major groups: • Vertebrates • Invertebrates

3. Invertebrates • These are animals without a backbone • There are eight groups of invertebrates • Sponges • Cnidarians • Flatworms • Roundworms • Annelids • Molluscs • Arthropods • Echinoderms

4. Sponges • Live in water • 5,000- 10,000 known species • Eats by sweeping water into pores • Simplest animal- No nervous system, tissues or organs • Reproduce sexually and asexually • Sessile – stay in one place • Asymmetrical symmetry

5. Cnidarians • Live in water • Approx. 9,000 known species • Tentacles have stinging cells • Simple muscles and nerves • Digestive tract with one entrance and exit • Radial symmetry

6. Flatworms • Lives on moist land, water and parasitic • Approx. 12,000 known species • Simple nervous system • Digestive tract with one entrance and exit • Reproduce sexually and asexually • Simplest bilateral symmetrical animal

7. Roundworms • Lives on moist land, water, and in a host • Approx. 20,000 known species • Simple nervous system • Simple body plan • Complete digestive tract with two ends • Bilateral symmetry

8. Annelids • Lives on moist land and in water • Approx. 20,000 known species • Segmentedbody • Well-developed organ systems • Complete digestive tract with two ends • Bilateral symmetry

9. Lives on land and in water Approx. 100,000 known species Most have a shell Muscular “foot” used to slide, dig or jump Complete digestive tract with two ends Bilateral symmetry Molluscs

10. Arthropods • Lives on land and in water • Most abundant phylum > 1 million • Segmented bodies • Hard exoskeleton • Well-developed nervous system • Complete digestive tract with two ends • Bilateral Symmetry • There are four group of arthropods: • Centipedes & Millipedes • Arachnids • Insects • Crustaceans

11. Arthropods - Arachnid • Have four pairs of legs. • Have bodies divided into two sections

12. Arthropods – Centipedes & Millipedes • Have long thin bodies and pairs of legs on each of their many body sections

13. Arthropods - Crustacean • Have five-seven pairs of legs • First pair often used as pincers • Bodies covered in shell

14. Arthropods - Insects • Have three pairs of legs • Bodies divided into three sections • Often have wings

15. Echinoderms • Live in the water (Ocean) • Approx. 6,000 known species • Endoskeletonusually covered with spines • Complete digestive tract with two ends • Radial Symmetry

16. Vertebrates • These are animals with a backbone. • There are five groups of vertebrates: • Fish • Amphibians • Reptiles • Birds • Mammals

17. Fish • Lives in water • 30,000-40,000 known species • Gills for breathing • Fins • Scales on body • Ectotherms • Bilateral Symmetry

18. Amphibians • Live in water and on land. • Approx.7000 known species • Breath with lungs and through skin • Metamorphosis (young live in water, adults live on land) • Ectotherm • Bilateral Symmetry

19. Reptiles • Live on land • Approx.10,000 known species • Thick skin • Covered with scales • Lungs • Lays eggs with shells • Ectotherm • Bilateral Symmetry

20. Birds • Live on land • Approx.10,000 know species • Beak, feathers, wings • Lungs • Hollow bones • Lays eggs with hard shell • Endotherms • Bilateral Symmetry

21. Mammals • Live on land and in water • Approx.5,500 know species • Mammary glands • Hair all over body • Large brains • Specialized teeth • Lungs • Endotherms • Bilateral Symmetry

22. Riddles • I live in the water • I have simple muscles and nerves • I have radial symmetry • What am I? A Cnidarian

23. Writingyour Riddles Solving others’ Riddles Include 3-4 facts about the phylum/class (do not use invertebrate/vertebrate) 2 parts to an answer: • Name the phylum/class • Tell if it is a vertebrate or invertebrate