1. Invertebrates & Vertebrates

2. InvertebratesVertebrates Multi-Cellular (many cells) Heterotrophs Obtain food & oxygen Keep internal conditions in balance Move Reproduce Fish, Amphibians, Reptiles, Birds, & Mammals Have backbones, an internal skeleton (endoskeleton), skin & muscles Blood circulates through blood vessels Moves by legs, wings or fins Nervous system w/brain & sensory organs likes eyes/ears Sponges, Segmented Worms, Echinoderms, Mollusks, & Arthropods No backbones or internal skeletons (Some have external skeletons called exoskeletons

3. Sponges Grows & Develops Reproduction Response to Stimuli Obtain Resources Pores allow water w/oxygen & food to enter a central cavity Asexual - Budding Starts as bud Internal & External Stimuli Eliminates Waste through the pores

4. How do sponges eat?

5. Segmented Worms Grows & Develops Reproduction Response to Stimuli Obtain Resources Long digestive tube runs the length of worm Sexual Long, Tube-like bodies divided into segments Internal & External Stimuli Simplest animal w/nervous system & blood Gets dissolved oxygen through skin Examples: earthworms & leeches

6. The Giant Earthworm

7. Leeches Click Here

8. Echinoderms Grows & Develops Reproduction Response to Stimuli Obtain Resources Tube feet also help it move Sexual Internal & External Stimuli Arms extend from the middle Tube feet take in oxygen from water Examples: sea stars, brittle stars, sea cucumbers, sea urchins

9. How do echinoderms move? Click Here

10. How do sea stars eat?

11. What is a sea cucumber?

12. Mollusks Grows & Develops Reproduction Response to Stimuli Obtain Resources Hunt for food Sexual Internal & External Stimuli Soft bodies Oxygen through gills or lungs Examples: slugs, snails, clams, octopus, squid Thick, muscular foot to move Some have shells More developed than sponges or worms

13. The Giant Clam – Filter Feeding

14. How does the clam respond to stimuli?

15. Slug eats flower (Mollusk w/o shell)

16. Arthropods Grows & Develops Reproduction Response to Stimuli Obtain Resources Hunt for food Sexual Internal & External Stimuli Segmented bodies Oxygen through gills or air tubes Examples: ants, beetles, spiders, scorpions, crabs, lobsters, shrimp Some have wings Outer covering - exoskeleton Jointed legs 3 Types Insects Arachnids Crustaceans

17. Silence of the Bees Click here

18. Arthropods outgrow their exoskeletons & shed them; this is called molting. Click Here

19. What is this horseshoe crab doing?

20. She molted!

21. Hermit Crabs

22. Wolf Spider Reproduction Click Here

23. Fish Grows & Develops Reproduction Response to Stimuli Obtain Resources Hunt for food Sexual Internal & External Stimuli Scales Oxygen through gills Live in water Fins Cold Blooded - ectothermic Most lay eggs

24. Amphibians Grows & Develops Reproduction Response to Stimuli Obtain Resources Hunt for food Sexual Internal & External Stimuli Oxygen through gills when young They go through a metamorphosis (drastic change) Cold Blooded - ectothermic Lay jelly – like eggs Oxygen through lungs when older Major Groups: frogs, toads, & salamanders Frogs & salamanders – smooth, moist skin Breathe through skin Live on land & water Toads – thick, bumpy skin & live on land

25. Reptiles Grows & Develops Reproduction Response to Stimuli Obtain Resources Hunt for food Sexual Internal & External Stimuli Scales or plates Cold Blooded - ectothermic Most lay eggs Oxygen through lungs Examples: snakes, turtles Some hatch eggs inside female

26. Birds Grows & Develops Reproduction Response to Stimuli Obtain Resources Hunt for food Sexual Internal & External Stimuli Feathers, beak, two wings, two feet Warm Blooded - endothermic Most lay eggs Oxygen through lungs when older Examples: robins, penguins

27. Mammals Grows & Develops Reproduction Response to Stimuli Obtain Resources Hunt for food Sexual Internal & External Stimuli Fur or hair Warm Blooded - endothermic Most give live birth Oxygen through lungs Examples: people, dolphins, monkeys, mice Makes milk for young