1. What are the characteristics of phylum poriferA?
Kingdom Animalia
What are animals?
How do animals develop?
What are the characteristics of phylum poriferA?

2. Kingdom Animalia Characteristics
Multicellular
Eukaryotic
Heterotrophic
No cell walls
2 main groups:
Invertebrates (95%) – no backbone
Vertebrates (5%) - backbone

3. Seven Essential Functions of Animals
Feeding
Herbivores, Carnivores, Filter Feeders, Detritivores, Symbiotic Relationships
Respiration
Glucose + Oxygen = Carbon Dioxide + Water + ENERGY
Circulation
Smaller animals rely on diffusion
Larger animals have circulatory system
Excretion
Elminates ammonia or converts it to a less toxic substance

4. Seven Essential Functions of Animals
Response
Use of nerve cells
Movement
Use of muscles even if animal is sedentary
Reproduction
Sexual and Asexual
Animals that are more complex have
Specialized cells
Bilateral body symmetry
Cephalization
Body cavity

5. Animal Development

6. Animal Development Zygote Blastula Gastrula
Blastopore in gastrula either becomes mouth (protostome) or anus (deuterostome)
3 cell layers develop from gastrula:
Endoderm (lining of digestive tract and respiratory system)
Mesoderm (muscles and most organ systems)
Ectoderm (sense organs, nerves, and skin)

7. Body Symmetry
Asymmetry
Radial symmetry
Bilateral symmetry

8. Body Cavity Formation Acoelomate – no body cavity
Pseudocoelomate – false body cavity
Coelomate – true body cavity

9. Phylum Porifera

10. Phylum Porifera – “Pore Bearers”
Multicellular, Heterotrophic, no cell walls
Few specialized cells
Choanocytes use flagella to move water through sponge
Spicules and archaeocytes make simple skeleton
Asymmetrical
Filter feeders
Respiration, circulation, and excretion are performed by water moving through sponge
Can produce toxins in response to predators
Sexual (external fertilization) or asexual reproduction