1. Drill
What do centipedes, horseshoe crabs, and scorpions have in common?

2. By: Justin Lloyd Brad DeBoy Alec Hawkins Tyler Koslofsky
Answer: Arthropods
By: Justin Lloyd
Brad DeBoy
Alec Hawkins
Tyler Koslofsky

3. Crab

4. Scorpion

5. Butterfly

6. Cool Stink Bug

7. Centipede

8. Grasshopper

9. Millipede

10. Scorpion (#2)

11. Tarantula

12. Crazy Crab

13. Lobster

14. Beetle

15. Lobster (#2)

16. Mating Horseshoe Crabs

17. COLORFUL BEETLE

18. Unit Vocabulary
Appendage- Any complex part or organ extended from the body.
Arthropod- Segmented animal with jointed appendages and a exoskeleton
Chelicerates- Includes spiders, scorpions , mites, ticks, sea spiders, and horseshoe crabs.
Chitin- clitellum of each worm secretes a tube made of mucus and tough carbohydrates

19. Cont.. Vocab
Crustaceans- An Arthropod with mandibles and branches appendages.
Exoskeleton- The hard, external cover of some invertebrates that provides protection and support.
Molting- The process of shedding an exoskeleton or any other outer layer of an animal.
Spiracles- An external opening of a trachea in an insect myriapod spider.
Uniramians- Centipedes, millipedes, and insect.

20. General Characteristics of Arthropods
1. A hard outer body covering called an exoskeleton
2. Specialized mouth parts
3. Jointed legs
4. Compound eyes
5. Segmented body parts

21. Body Plan Arthropods have segmented bodies
Body sections bear jointed extensions called appendages (ex: legs+ antennae)
Have an exoskeleton that provides protection and support

22. Body Plan cont… Made up of 3 sections secreted by the epidermis
1st layer is waxy and composed of a mixture of protein and lipids
2nd layer is comprised of protein and chitin and provides primary protection
3rd layer contains proteins and chitin
Is flexible at the joints to allow movement

23. Body Plan cont..
Has a high level of cephalization meaning that it has many sensory organs and appendages in one region
Have segmented antennae and compound eyes that have individual light receptors
Sensory organs send nerve impulses to the brain that coordinates movement
Have open circulatory systems

24. Molting
Arthropods molt their exoskeleton to allow for growth.

25. Crustaceans
Crustaceans have an exoskeleton, two parted limbs, and nauplius larvae (their eggs).
Examples: Crabs, Lobsters, Shrimp

26. Chelicerata They have segmented bodies with jointed limbs.
They have open circulatory system.
They used to be predators, but are now mostly involved in mutualism, and scavenging.
Examples: Horseshoe Crabs, scorpions, spiders, mites, harvestmen (Daddy Long Legs), ticks.

27. Uniramians They have exoskeletons, and jointed appendages.
Legs are only one branch they are interterrestrial.
They have antennae.
Examples: Insects, centipedes, millipedes, and beetles.

28. VIDEO TIME http://www.youtube.com/watch?v=UFe3cZLuhUs
“Baby You’re an Arthropod”
Tarantula Song