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. Sponge Feeding Video

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

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

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

14. Most Cnidarians have radial symmetry

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

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

19. The Hydra is a freshwater cnidarian we will study in the lab
What kind of symmetry does hydra have?
Is it a medusa or a polyp?

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

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

22. Coral Reefs are made from the skeletons of cnidarians

26. Multimedia
Sponge Images and Videos -
Cnidarian Images and Videos -
General Invertebrate Movies at National Geographic 
--- really good video on the portuguese man of war (under invertebrates)
Hydra Video at