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ARTHROPODS A very successful group CHARACTERISTICS SEGMENTED BODY TOUGH EXOSKELETON – PROTEIN & CHITIN JOINTED APPENDAGES: LEGS; ANTENNAE; MOUTH PARTS COMPLEX ORGAN SYSTEMS HIGH DEGREE OF CEPHALIZATION OPEN CIRCULATORY SYSTEM FEEDING HERBIVORE; CARNIVORE; OR OMNIVORE RESPIRATION TERRESTRIAL ARTHROPODS TRACHEAL TUBES (TRACHEAE) SPIRACLES AIR SAC BOOK LUNG – SPIDER AQUATIC ARTHROPODS gills CIRCULATION OPEN CIRCULATORY SYSTEM BLOOD LEAVES BLOOD VESSEL AND DIRECTLY SURROUNDS TISSUES EXCRETION ELIMINATION OF NITROGENOUS WASTES MALPIGHIAN TUBULES – INSECT GREEN GLAND - CRUSTACEAN NERVOUS SYSTEM WELL DEVEL0PED BRAIN, VENTRAL NERVE CORD COORDINATE MOVEMENTS EYES, EARS MOVEMENT MUSCLES PULL ON EXOSKELETON REPRODUCTION SEPARATE SEXES TERRESTRIAL ARTHROPOD: INTERNAL FERTILIZATION AQUATIC ARTHROPOD: INTERNAL OR EXTERNAL FERTILIZATION GROWTH & DEVELOPMENT EXOSKELETON DOES NOT GROW WITH THE ORGANISM MOLT GROUPS OF ARTHROPODS CLASSIFIED BY NUMBER AND STRUCTURE OF BODY SEGMENTS AND APPENDAGES CRUSTACEA ARACHNID INSECTS CENTIPEDE MILLIPEDE CLASS CRUSTACEA AQUATIC CRAB; SHRIMP; LOBSTER; CRAYFISH EXOSKELETON HAS CALCIUM 2 PRS. BRANCHED ANTENNAE Antennule: touch, taste, equilibrium Antenna: touch taste CRUSTACEA (CONT’D.) 2 OR 3 BODY REGIONS CHEWING MOUTH PARTS: MANDIBLE – BITE AND GRIND CRAYFISH FRESHWATER 2 BODY REGIONS: cephalothorax & abdomen CARAPACE – EXOSKELETON IN CEPHALOTHORAX 5 PAIRS OF LEGS CHELIPED: 1st pair of legs SWIMMERETS: ventral surface of abdomen TELSON & UROPOD: tail OPEN CIRCULATORY SYSTEM: dorsal aorta RESPIRATION: GILLS EXCRETORY ORGAN: GREEN GLAND ARACHNID 2 BODY REGIONS 4 PAIRS OF LEGS BOOK LUNGS: RESPIRATION SPINNERETS: glands which produce web CLASS INSECTA EVOLUTION OF FLIGHT ALLOWED INSECTS TO SPREAD OUT 3 BODY REGIONS: head; thorax; abdomen 3 PAIRS OF LEGS ON THORAX: walking; jumping; hold food 1 ANTENNAE 1 PAIR OF COMPOUND EYES: many lenses 2 PAIRS OF WINGS ON THORAX TYMPANUM – EAR ; ON THORAX MOUTH PARTS: labrum; labium; maxilla; mandible CIRCULATION: open Dorsal aorta Does not use circulatory system to exchange oxygen METAMORPHOSIS CHANGE IN FORM DURING DEVELOPMENT COMPLETE: EGG LARVA PUPA ADULT BUTTERFLY INCOMPLETE: EGG NYMPH ADULT GRASSHOPPER