What do we have in common?

1. What do we have in common?

2. Arthropods Day 1 What you’ll learn: List features that are used to classify arthropods Explain how the structure of the exoskeleton relates to its function

3. Arthropods • Largest and most diverse group of animals • The term arthropod comes from the words arthros meaning “jointed” and poda meaning “foot” • All arthropods have jointed appendages. • Appendages are things like legs, claws or antennae that grow from the body.

4. Arthropod’s Skeleton • Arthropods do not have bones. They have an exoskeleton. An exoskeleton is a hard outer body covering. • Exoskeletons help to support the body and reduces water loss. • As the animal grows, the exoskeleton must be shed because it does not grow with the animal. This process is called molting.

5. NOTE CHECK!! • 1. What is the function of an exoskeleton? • 2. What do all arthropods have in common?

6. Insects • Insects are the largest group of arthropods • All insects have 3 body reigns. They have a head, thorax and abdomen. All insects have 6 legs. Insects are the only invertebrate with wings. • Insects have open circulatory systems. Oxygen is not transported by the blood, food and waste are. • Insects breathe through openings called spiracles.

7. Insect Body Segments What body segment contain the legs or wings? What body segment contain the antenna?

8. Examples of Insects

9. Metamorphosis • Many young insects do not look like their adult forms • Changes in body form are called metamorphosis • Complete Metamorphosis: 4 stages including egg, larva, pupa and adult. • Incomplete Metamorphosis: 3 stages including egg, nymph and adult.

10. Complete vs Incomplete

11. Flies Bugging Bees? What is the problem presented in the article? How do bees become zombies? What is colony collapse disorder (CCD)? Why are bees important? What would happen if all bees went extinct?

12. Homework Due 5/22/13 • Choose 1 insect and answer the following in the form of a paragraph: • 1. What is the scientific name of this insect? • 2. What does this insect eat? • 3. What type of metamorphosis does this insect go through? • 4. Where can we find this insect? • 5. What unique features does this insect have?

13. Arthropods Day 2 What you’ll learn: Compare and Contrast insects and arachnids Explain how centipedes differ from millipedes

14. Arachnids • Arachnids are arthropods with 2 body segments. They have a head and cephalothorax along with 4 pairs of jointed legs (8 legs total) • Arachnids like spiders and scorpions can have venom in their fangs or tail. This venom paralyzes the prey and makes it easy to eat.

15. Examples of Arachnids

16. Centipedes and Millipedes • Both centipedes and millipedes are long segmented animals with many pairs of jointed legs. • Centipedes have 1 pair of jointed legs per section • Millipedes have 2 pairs of jointed legs per section • Centipedes are predators that can have venom to catch prey and Millipedes are herbivores that eat plants

17.  Millipede Centipede 

18. NOTE CHECK! • 1. Name 2 examples of arachnids. • 2. How are centipedes different from millipedes? • 3. What does venom do?

19. Crustaceans • Marine arthropods have very thick exoskeletons and often large claws or pincers. • Crustaceans include all crabs, lobsters, shrimp, crayfish, water fleas and sow bugs. • Crustaceans usually have swimmerets on their abdomen that help them to force water over their gills.

20. Examples of Crustaceans