1. The Animal Kingdom

2. Characteristics of Animals Eukaryotic Multicellular Reproduce Specialized Cells Heterotrophic (must obtain food) Must Digest Food Most animals move and have a fixed size in the adult form

3. ANIMAL PHYLA A B C

4. 1 2 34 56 78 10 11 9

5. Classification of Animals Symmetry: Assymetrical  Radial  Bilateral Body Cavity: Acoelomate  Pseudoceolomate  Coelomate Embryonic Openings Protostome  Deuterostome

6. Symmetry

7. Body Symmetry of Animals

8. Asymmetry cannot be divided into mirror images Ex- sponges Very simple organisms Believed this type of organism evolved 1st

9. Radial Symmetry: can be cut in half along many planes that allow for nearly identical halves Ex- Hydra: adaptation to be able to see prey coming at it from any direction

10. Bilateral Symmetry: a single plane divides body into two mirror images More complex organisms exhibit this kind of symmetry

11. Proto/Deuterostomes Deuterostomes – Radial Cleavage – Blastopore becomes the __anus_____ – Indeterminate Cleavage: which means early on in development the fates of the cells are undetermined Protostomes- – Spiral Cleavage – Blastopore becomes the ____mouth___ – Determinate Cleavage- which means that each cell of the embryo has a fixed or determined fate.

12. How else do we classify Animals? DNA Coelom or not Physical Characteristics

13. Body cavity

14. Acoelomates FLATWORMS (Phylum _________) May be the 1 st organisms to evolve organs from mesoderm Solid, compact body Organs imbedded in the solid tissue of the body. first to have the three cell layers Ecto/endo/mesoderm Have a digestive tract (one way gut)

15. Pseudocoelomates Roundworms (Phylum _________) Have a body cavity It’s fluid-filled and partly lined with mesoderm Enables animal to move more quickly Muscles attach to the mesoderm and brace against the pseudocoelom

16. Coelomates Segmented worms (Phylum ______) Coelom provides space for development of organs/ organ systems This allows for membranes like the parietals and viscerals Have a TRUE body cavity COELOM= fluid-filled space COMPLETELY surrounded by mesoderm. Coelom cushions and protects internal organs and provides room for them to grow and move independently

17. EctodermEndodermMesodermCoelom Do You Have A Cavity??? Digestive Tube

19. Get ready to CLICK!!!

20. What type of symmetry is shown here? 1.Bilateral 2.Radial 3.Asymmetry

21. What type of symmetry is shown here? 1.Bilateral 2.Radial 3.Asymmetry

22. What type of symmetry is shown here? 1.Bilateral 2.Radial 3.Asymmetry

23. What type of symmetry is shown here? 1.Bilateral 2.Radial 3.Asymmetry

24. What type of symmetry is shown here? 1.Bilateral 2.Radial 3.Asymmetry

25. What type of symmetry is shown here? 1.Bilateral 2.Radial 3.Asymmetry