1. Animal Kingdom
Invertebrate Phylum

2. Porifera

3. The sponge Symmetry? Germ layers? Body cavity? Level of organization?
Cool characteristics:
Choanocytes
Amoeboid cells
Spicules/spongin
Mostly Asexual reproduction
sessile

4. Cnidarians

5. anthozoa, hydrozoa, scyphozoan
Symmetry?
Germ layers?
Body cavity?
Level of organization?
Cool characteristics
Mesoglea
Cnidocytes, nematocysts
Gastrovascular system
2 body forms: polyp and medusa

6. Nemertea and Platyhelminthes

7. Ribbon worms and flatworms
Symmetry?
Germ layers?
Body cavity?
Level of organization?
Cool characteristics
Proboscis apparatus
Free living or parasitic flatworms
Cephalization
Gas exchange through diffusion

8. Nematoda and Rotifera

9. Roundworms and rotifers
Symmetry?
Germ layers?
Body cavity?
Level of organization?
Cool characteristics
parasitic roundworms – Ascaris, Trichinella, filarial worms – dogs (heartworm) humans (elephantiasis)
Crown of cilia – corona, locomotion

11. 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

12. Benefits of coelom
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

13. Mollusca

14. mulluscs Symmetry? Germ layers? Body cavity? Level of organization?
Cool characteristics
3 part body plan (mantle, foot, visceral mass)
Open circulatory system in most
3 main classes
Bivalves
Gastropoda
cephalopoda

15. Annelids

16. Segmented worms Symmetry? Germ layers? Body cavity?
Level of organization?
Cool characteristics
Marine worms, earth worms and leeches
Setae – bristles that anchor the worm
hermaphroditic

17. Arthropods

18. Jointed appendages Symmetry? Germ layers? Body cavity?
Level of organization?
Cool characteristics
Exoskeleton of chitin, molt
Segmentation is modified for specialization
Well developed nervous system
Variety of respiratory organs
metamorphosis

19. Further classification of arthropods
3 subphyla of arthropoda
Crustacea – crayfish, shrimp and craps
Most aquatic, hard exoskeleton, compound eyes and 5 pair of appendages.
Uniramia – centipedes, millipedes and insects
Most live on land and breathe through trachea, thorax and abdomen have only 1 pair of appendages
Chelicerata – horseshoe crabs, spiders ticks and mites
Live in all environments, first pair of appendages are pinchers (chelicerae), 2nd pair pedipalps (feeding)
Fused head and thorax, cephalothorax

20. Echinoderms

21. Spiny skin Symmetry? Germ layers? Body cavity? Level of organization?
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