1. Protostomes

2. Porifera Cnidaria Ctenophora Acoelomorpha Rotifera Platyhelminthes Annelida Mollusca Nematoda Tardigrada Onychophora Arthropoda Coelom Bilateral symmetry Protostome development ANIMALS LOPHOTROCHOZOA ECDYSOZOA Echinodermata Chordata PROTOSTOMES

3. Lophophore Bryozoans

5. Phylum Rotifera Click here for video of rotifers

7. Phylum Platyhelminthes

8. Beat diffusion by being flat - Increase size without increasing distance to each cell

9. Diffusion

10. Platyhelminthes - Planaria

11. Planarian video here

13. Phylum Annelida

15. Hydraulic movement in a tubular animal

17. Phylum Mollusca

20. Porifera Cnidaria Ctenophora Acoelomorpha Rotifera Platyhelminthes Annelida Mollusca Nematoda Tardigrada Onychophora Arthropoda Coelom Bilateral symmetry Protostome development ANIMALS LOPHOTROCHOZOA ECDYSOZOA Echinodermata Chordata PROTOSTOMES

21. Ecdysozoa

22. Phylum Nematoda

23. See Nematode movement here

25. Phylum Arthropoda

27. 2x Area = 1 Strength = 1 Weight = 1 Strength/wt = 1 Area = 1 Strength = 4 Weight = 8 Strength/wt = 1/2

28. Generalized arthropod -Segments -Exoskeleton -Ventral nervous system with anterior, dorsal brain

29. tagmatization

31. Tracheal system -Spiracles -Trachea -tracheoles