1. Kingdom Animalia: Porifera & Cnidaria
Unit 6 – Lecture 7

2. Kingdom Animalia Animals Are: eukaryotic multicellular
sexually reproducing mostly
some have asexual reproduction

3. Kingdom Animalia
Animals Have:
have no cell wall
have specalized cells

4. Kingdom Animalia Animals Have: most have tissues
tissue – groups of specilized cells that work together as a single unit.
examples: heart, lung, skin…etc
organs are made of tissues

5. Symmetry Asymmetry non-symmetrical most are sessile
sessile – non-moving
ex: sponges

6. Symmetry Radial Symmetry symmetrical from the center out develops from
2 layers of cells
2 OR 3 layers of tissues
ex: starfish, jellyfish, etc.

7. Symmetry Bilateral Symmetry bi = two, lateral = refers to side
symmetrical along a median line
develops from 3 layers of tissues
ex: most commonly chordates

8. Phylum Porifera ex: sponges, aka pore-bearers
asymmetrical [or radial] – sessile
2 layers of cells – no tissues
no body cavity

9. Phylum Porifera
get nutrients thorugh filter feeding

10. Phylum Porifera reproduces sexually with gametes
asexually using gemmules [like budding]
asexually using fragmentation
respires through diffusion

11. Phylum Cnidaria jellyfish, hydras, anemone, coral…etc
aka stinging-celled organisms
Cnidarians Have:
radial symmetry
2 layers of tissues
simple nervous system
senses chemical “smells” & touch

12. Phylum Cnidaria
Cnidarians Have:
2 body forms

13. Phylum Cnidaria ingestion using tentacles
nematocysts – small, harpoon-like stinging cells inside of cnidocytes

14. Phylum Cnidaria Cnidarians Have: digestion using gastrovascular cavity
gastro = stomach
gastrovascular cavity – singular cavity which includes digestion and respiration

15. Phylum Cnidaria reproduce sexually with gametes
asexually using budding
immortal jellyfish??
respires using diffusion

16. HW: Finish Porifera/Cnidaria pages for tomorrow
read the Cnidaria worksheet