1. 5/7/14 Objective: Invertebrates Do Now: What kingdom are invertebrates in?

2. Characteristics of Animals 1. Eukaryotic 2. Lack cell walls 3. Multicellular 4. Heterotrophs that ingest food

3. Life Cycle of an Animal Sperm(n) + Egg(n)--->Zygote(2n)---->Blastula---->Gastrula---->Larva >Adult

4. Invertebrates and Vertebrates Invertebrates: - animals without a backbone Vertebrates: - animals with backbones

6. Phylum Porifera (Sponges) -Simplest animals -Lack true tissues, unspecialized cells -Asymmetrical

7. Structure (Body Plan) 2 layers Outer layer of cells: - protects the inner layer - has many pores for water flow

8. Inner Layer- Collar Cells and Ameobocytes Collar Cells - Generate incurrent of water - have flagella that capture food Ameobocytes: - pick up food from collar cells, digest it, - transport oxygen, dispose waste

9. Ingestion Filter feeders

10. Reproduction Budding (asexual): new sponges develop from an outgrowth of parent Sexual: male and female gametes (egg and sperm) Regeneration (asexual): small fragments can grow into new sponge

11. Movement Sessile: anchored in place, cannot move

12. Evolution Evidence shows that sponges evolved from early protists (animal-like) protists

13. Phylum Cnideria (Hydra, Jellies, Sea Anenomies, Coral 2 Characteristics ALL Cniderians Share Tentacles with stinging cells Radial symmetry -No head -Body parts arranged like pieces of pie

14. Stinging Cells Cnidocytes: stinging cells along tentacles Nematocyst: type of stinging capsule -Coiled tubule with poisonous barb -Only fires once

15. Body Form Polyp: cylindrical body with tentacles coming from one end - sessile - hydras Medusa: umbrella-shaped with tentacles around lower edge -Move freely -Jellies

16. Body Form

17. Nutrition Tentacles: maneuver food into mouth in center Gastrovascular cavity: digestive sac - Fluid in cavity transport digested food to cells lining cavity, and transport waste out

18. Hydrozoa Hydras Some coral Portugese man-of-war Coloines of polyps

19. Scyphozoa Jellies

20. Anthozoa Sea anemones Most coral animals

21. Phylum Cnetophora Comb Jellies No stinging cells