1. Animal Kingdom
Invertebrate Phylum

2. Animal Kingdom characteristics
Eukaryotic
Heterotrophic
Multicellular
Most sexual reproduction, asexual = budding, fragmentation
No cell walls

4. Symmetry
Asymmetry
Radial symmetry
Bilateral symmetry

5. Porifera

6. The sponge Asymmetric Cell level of organization Cool characteristics:
Choanocytes
Amoeboid cells
Spicules/spongin
Mostly Asexual reproduction
sessile

7. Cnidarians

8. anthozoa, hydrozoa, scyphozoan
Symmetry - radial
Tissue layer of organization
Gastrovascular cavity
Cool characteristics
Mesoglea
Cnidocytes, nematocysts
2 body forms: polyp and medusa

9. Nemertea and Platyhelminthes

10. Ribbon worms and flatworms
Bilateral symmetry
Gastrovascular cavity
Sensory cells
Level of organization?
Cool characteristics
Proboscis apparatus
Free living or parasitic flatworms
Cephalization
Gas exchange through diffusion

11. Benefits of coelom – body cavity
Freer body movements – outer wall independent of gut
Ample space allows for growth of organs
Fluid protects organs from damage
Storage for reproductive, digestive wastes prior to being expelled
Hydrostatic skeleton – muscle contraction against fluid in cavity

12. Nematoda and Rotifera

13. Roundworms and rotifers
Bilateral Symmetry
Pseudocoelomates
Cool characteristics
parasitic roundworms – Ascaris, Trichinella, filarial worms – dogs (heartworm) humans (elephantiasis)
Crown of cilia – corona, locomotion

15. Protostomes Deuterostomes
Mulluscs, annelids, arthropods
Spiral and determinate
cleavage
Blastopore is mouth
Coelom forms by a splitting of the mesoderm
Echinoderms and chordates
Radial and indeterminate
Blastopore is anus
Coelom forms by outpocketing of primitive gut

16. Mollusca

17. mulluscs Bilateral Symmetry Coelomates Cool characteristics
3 part body plan (mantle, foot, visceral mass)
Open circulatory system in most
3 main classes
Bivalves
Gastropoda
cephalopoda

18. Annelids

19. Segmented worms Bilateral Symmetry Segmentation
Digestive system with specialized regions
Cool characteristics
Marine worms, earth worms and leeches
Setae – bristles that anchor the worm
hermaphroditic

20. Arthropods

21. Jointed appendages Bilateral Symmetry Cool characteristics
Exoskeleton of chitin, molt
Segmentation is modified for specialization
Well developed nervous system
Variety of respiratory organs
Metamorphosis – complete/incomplete

22. Echinoderms

23. Spiny skin Symmetry – radial-(adults) and bilateral-(larvae)
Cool characteristics
Primarily bottom dwellers
Larvae are free swimming filter feeders with bilateral symmetry
Endoskeleton made of spiny calcium rich plates called ossicles
Water vascular system - locomotion