1. Phylum Porifera
Sponges
Phylum Cnidaria 
Jellyfish, corals .....

2. Don’t forget – sponges are animals and belong to the Animal Kingdom
1. Multicellular
2. No organs or body systems
3 . Cellular digestion (heterotrophic)
4. Asymmetry

3. Sponges are SESSILE – they do not move
They obtain food by FILTER FEEDING

4. Reproduce sexually (sperm and eggs) Reproduce asexually (regeneration)
Skeleton composed of spongin (soft) and spicules (hard)

5. Sponge Anatomy

7. Amebocytes - cells within the sponge that move around supplying nutrients and taking away waste

8. CHOANOCYTES – collar cells
· layer of cells with flagella · the movement of the flagella keeps a water current going in the sponge · food vacuoles in the collar cells digest plankton and other small organisms (filter feeder)

10. Cnidarians - jellyfish, coral, hydra, sea anemone
*Named after the stinging cells found on their tentacles called CNIDOCYTES

11. Characteristics of Cnidarians · Tentacles · Cnidocytes (stinging cells)

12. · Nematocysts (barbs)· Gastrovascular cavity (digestion)

13. Most Cnidarians have radial symmetry

14. Cnidarians have two body forms:
polyp (vase shaped)               medusa (cup shaped)

15. Portuguese Man of War - cnidarian that floats in the water and has long tentacles

17. Video: Jellyfish Scene from Nemo

18. The Hydra is a freshwater cnidarian
What kind of symmetry does hydra have?
Is it a medusa or a polyp?

19. Video of hydra at http://www. microscopyu

20. Hydra Anatomy (printable)
WORD BANK Gastrovascular cavity Tentacle
Cnidocyte
Ectoderm
Endoderm
Mesoglea
Ovary/Teste
Bud
Nematocyst
Mouth
Basal Disk

21. Coral Reefs are made from the skeletons of cnidarians

24. Multimedia
Sponge Video
Jellyfish
Jellyfish and Cousins