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

4

5 Phylum Rotifera Click here for video of rotifers

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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

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13 Phylum Annelida

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15 Hydraulic movement in a tubular animal

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17 Phylum Mollusca

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19

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

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25 Phylum Arthropoda

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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

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31 Tracheal system -Spiracles -Trachea -tracheoles