Name: _______________________
Period: ______________________
ARTHROPODS
HOLT CH. 29
PG. 701-711
ARTHROPOD CHARACTERISTICS
 _____________________________________
 _____________________________________
 _____________________________________
 Most have _____________________________________
 Many have __________________________
 ______________________________
 _________________________________________ in larval stage
 ________________________________________
 APPENDAGE-structure that extends form arthropod’s body wall
 ARTHROPOD=“_______________________________”
 __________________________-made of carbohydrate CHITIN-thin/flexible
 ________________________ attach
 ________________________ attach
 ___________________________
 _____________________________________
REPSIRATION AND CIRCULATION
 ____________________________-air enters body through these openings
 _____________________-tubes there air travels from spiracles to bloodstream
 Aquatic arthropods breath with __________________
 _______________ CIRCULATORY SYSTEM
 Terrestrial arthropods breath with ______________ _________________
FEEDING/DIGESTION/
EXCRETION
 Many mouthparts/appendages for taking in food
 ____________________ __________________-excretory system of arthropods Waste leaves through _________________
 ___________________________ EYE
 Composed of thousands of individual visual units
 SOME also have simple eyes (single lenses)-see only light and dark, not images
LIFE CYCLE
 Most reproduce ___________________
 Usually______________________ fertilization
 Many have specialized reproductive organs
 _________________________-shedding of exoskeleton to allow for growth
GROUPS OF ARTHROPODS
 4 main groups (SUBPHYLA of phyla ARTHROPODA)
 ________________________-insects
 _________________________-millipeds/centipedes
 _________________________--lobsters/shrimp
 _________________________--spiders
 SEE PG. 705!!!
 SUCCESS OF ARTHROPODS
 More arthropods than all other animal groups COMBINED
 More than ______________________ species identified (and growing)
 Exoskeleton provides _______________________ (land and water)
 Wide range of food sources and habitats
ARACHNIDS
 SUBPHYLUM __________________________ (spiders, scorpions, mites, ticks and
horseshoe crabs)
 Have appendages called __________________________________ (1st pair of
appendages specialized for feeding)
 Modified into pincers or fangs
 ____________________________-2nd pair of appendages-catch and handle prey
 _____________________________ of WALKING LEGS
 No antennae
 _______________________________________ (head chest)
 ____________________________________ (belly)
 ________________________________-largest class
CLASS ARACHNIDA
 All (except some mites) are ___________________________________
 Most _________________________________
 Don’t have jaws (consume only ______________________________)
 _____________________________ turn prey into liquid (see pg. 710-711)
 Most do more good than harm (predators of insects)
SPIDERS
 Chelicerae of spiders modified into fangs
 Poison glands secrete toxins (kills/paralyzes prey)
 2 poisonous species in US
 ______________________________________
 ______________________________________
 _______________________-appendages at end of abdomen-secrete sticky silk
strands
SCORIONS/MITES/TICKS
 ________________________-segmented abdomen ending in venomous stinger
 Grasping pincers-seizing food and sexual reproduction
 _______________-head, thorax and abdomen fused into single unsegmented
body
 Most not harmful
 Can spread viral/fungal infections (ex. ________________________)
 _____________________________________ Ancient group of invertebrates (400 million years)
SUBPHYLUM CRUSTACEA
 ___________________________, some fresh water
 __________________________ (head chest) and ABDOMEN
 Appendages on _____________________
 Have _____________________ for feeding and two antennae
 Breathe with _____________________________
TERRESTRIAL CRUSTACEANS
 ______________________________ (only PARTIALLY adapted for land-tied to
ocean)
AQUATIC CRUSTACEANS
 ___________________________ (most abundant multicelled food source), krill,
barnacles (sessile),
 ___________________-crayfish, crabs, lobsters (_________________ legs)
 ______________________-’hood’ over cephalothorax
 LARVA=___________________ (MOLTS several times to allow for growth)
 FOOD CHAIN-fairy shrimp, water fleas, krill
 _____________________-barnacles
DECAPODS
 LARGEST GROUP OF CRUSTACEANS
 Shrimp, crayfish, crab, lobsters
 _____________________-pinchers
 _____________________-swimming legs on ventral abdomen
 ___________________________-flattened tail on posterior end (swim
backwards)