1. ARTHROPODS

2. Three Important characteristics
Jointed appendages
Segmented bodies
Chitin exoskeleton
Arthro = “joint”
Poda = “foot”

3. “Crunching” Arthropods?
Strong exoskeleton composed of chitin (type of protein) OR calcium carbonate

4. Nitrogen Waste… Terrestrial: use Malpighian tubules
Aquatic: use Green Glands
*Act like kidneys to filter & remove toxic nitrogen from the system

5. Subphylum Uniramia

6. Flies Eyes (say that 5 times fast )
Simple Eyes: Sense light and dark (like ocelli)
Compound Eyes: Have multiple lenses (up to 2000!); can see images from multiple angles

7. Examples…
Centipedes
Millipedes
Insects (flies, bees, ants)

8. Can fly!
3 pairs of walking legs
Separate individuals dependant on others for various jobs
Ex. Collecting food, defence, etc
Unique Features for Movement
Insect Societies

9. Carnivores
1 pair legs per segment
Feed on detritus
2 pairs legs per segment
Centipedes
Millipedes

10. THREE main body parts
Head
Thorax
abdomen

11. Feeding Thin mouth parts pierce host’s skin Sucks blood (parasitic)
Proboscis used to sip nectar from plants
Mosquito
Butterfly

12. Pheromones Chemicals affecting behaviour/development
Can be used to indicate trail to food source

13. Bee Dances Shows others type, direction and distance to food
ROUND DANCE: source of food <50m from hive
WAGGLE DANCE: source of food >50m from hive

15. subPhylum chelicerata

16. Examples…
Spiders
Scorpions
Mites
Ticks

17. Making silk
Glands in abdomen  liquid silk pushed through SPINNERETS

18. Chelicerate Structures
Main body parts: Cephalothorax & Abdomen
Mouthparts: Chelicerae (adapted for different purposes) and Pedipalps (longer than chelicerae)

19. Spiders
Hollow chelicerae
Inject VENOM into prey
Produce silk

20. Mites & Ticks
Most parasitic
Small chelicerae pierce skin of host

21. Scorpions Pedipalps enlarged into CLAWS
Segmented abdomen has venomous barb at tip

22. Subphylum crustacea

23. Examples…
Pill bugs
Crayfish
Lobster
Crab

24. Body parts Exoskeleton (made of chitin) 2 pairs of antennae
Mandibles (mouthparts)

25. Antennae “Feelers” to detect movement using sensory hairs
Some are adapted for feeding

26. Features on Abdomen Feathery “gills (filter feeding) Large claws
Walking legs or swimmerets
Paddle like tail