1. CLASS INSECTA CLASS ARTHROPODA CLASS MYRIAPODA CLASS CRUSTACEA

2. SYMMETRY: Bilateral REPRODUCTION: Sexual MOVEMENT: varies (most have legs to move on) FOOD: Carnivores and Herbivores

3. 4 CHARACTERISTICS : EXOSKELETON JOINTED APPENDAGES (as seen above: jointed legs) SEGMENTED BODY (as seen above: Head, thorax, abdomen) OPEN CIRCULATORY SYSTEM IN GREEK: Jointed legs Jointed legs

4. OPEN CIRCULATORY SYSTEM: Blood is pumped into body cavities where tissue is surrounding this cavity. The oxygen and nutrients diffuse into the tissues and then into the cells. CLOSED CIRCULATORY SYSTEM: Blood is pumped through vessels (veins and arteries) throughout the body. The blood is always in a closed tube.

5. EXOSKELETON: We have an internal skeleton, where arthropods have an external skeleton. They have NO bones on the inside, only a hard skeleton on the outside they must “MOLT” to grow. MOLTING All arthropods must molt, or shed their outer skeleton to grow or change their shape. Molting is controlled by hormones within the body of the arthropod.

6. GREEK FOR: Hard exoskeleton Contain two pair of antennae and mouth parts for crushing and grinding food. Crustaceans breathe through the use of GILLS. Here are some examples: Hermit crabs Lobsters Barnacles Daphnia Shrimp

7. millipedes “thousand- leggers” centipedes Centipedes are Carnivores. Millipedes are herbivores Why are we always found in damp places, like under rocks? Our exoskeletons are not waterproof, so we live in damp places because we don’t want to lose excess water.

8. TICKS SCORPONS SPIDERS MITES (DUST MITES) ALL HAVE 4 OR 8 LEGS 2 MAIN BODY SEGMENTS: HEAD/THORAX ABDOMEN Arachnophobia

9. 3 BODY SEGMENTS ALL HAVE 6 LEGS ATTACHED TO THE THORAX (CHEST)

10. PHEROMONES – HORMONES THAT ATTRACT MATES STINGERS, CAMOUFLAGE, POISON, SPINES, ETC.

11. METAMORPHOSIS – to transform