1. ANIMAL KINGDOM

2. INVERTEBRATE ANIMALS Occupy all terrestrial and aquatic ecosystems 34 phyla We will be studying: 1.Sponges and Cnidarians 2.Worms 3.Molluscs 4.Echinoderms 5.Arthropods

3. INVERTEBRATE ANIMALS 1.SPONGES AND CNIDARIANS SPONGES (PHYLUM PORIFERA) -Marine and freshwater -Asymetrical body plan -2 cell layers, No tissues -Sessile -Trap food as water passes through internal body channels

4. INVERTEBRATE ANIMALS 1.SPONGES AND CNIDARIANS CNIDARIANS (PHYLUM CNIDARIA) -hydras, jellyfish, sea anemones, corals -Radial body symmetry -2 cell layers specializing into tissues -Swim and capture prey using stinging tentacles around the mouth -Food digested in gastrovascular cavity

5. INVERTEBRATE ANIMALS 1.SPONGES AND CNIDARIANS CNIDARIANS (PHYLUM CNIDARIA)

6. INVERTEBRATE ANIMALS 1.SPONGES AND CNIDARIANS CNIDARIANS (PHYLUM CNIDARIA) -2 body forms a)Polyp: cylindrical, attaches to surfaces, extending tentacles up and out, wait for prey Ex: adult sea anemones, corals, hydras b)Medusa: flattened, mouthdown form that is not attached, moves passively with currents or by body contractions Ex: jellyfish ** May have one body form or alternate

7. INVERTEBRATE ANIMALS 1.SPONGES AND CNIDARIANS CNIDARIANS (PHYLUM CNIDARIA) -2 body forms

8. INVERTEBRATE ANIMALS 2.WORMS FLATWORM (PHYLUM PLATYHELMINTHES) -Least complex -Acoelomates, 3 cell layers -Simple nervous system (brain-like density and eyespot at head end) -Ex: parastic tapworms, flukes, free-living planarians

9. INVERTEBRATE ANIMALS 2.WORMS SEGMENTED WORMS (PHYLUM ANNELIDA) -Long tube-like bodies with ringed segments -Distinct head end -Several organ systems

10. INVERTEBRATE ANIMALS 3.MOLLUSCS (PHYLUM MOLLUSCA) -Bilateral symmetry -Mantle, organ filled body, muscular foot, sense organs -Coelom, 3 cell layers, 2 body openings -Soft body protected with hard shell -3 classes a) Class bivalvia b) Class Gastropoda c) Class Cephalopoda

11. INVERTEBRATE ANIMALS 3.MOLLUSCS (PHYLUM MOLLUSCA) a)Class bivalvia - Marine and freshwater -Clams, mussles, oysters, scallops -Protected by hinged shell b) Class Gastropoda - Terrestrial, freshwater and marine -Shelled snails and non-shelled slugs -Coiled shell

12. INVERTEBRATE ANIMALS 3.MOLLUSCS (PHYLUM MOLLUSCA) c) Class Cephalopoda -Octopus and squid -Marine -Grasping tentacles allow for propulsion

13. INVERTEBRATE ANIMALS 4.ECHINODERMS (PHYLUM ECHINODERMATA) -Sea stars, sea urchins, sea cucumbers, sand dollars -Marine animals -Radial symmetry -Spiny endoskeleton (internal skeleton of calcium carbonate), covered in skin -Water vascular system including tube feet

14. INVERTEBRATE ANIMALS 5.ARTHROPODS (PHYLUM ARTHROPODA) -Largest animal phylum -Spiders, scorpions, crustaceans, insects -Jointed foot -Exoskeleton (protein and chitin) which is periodically shed