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Entering the EXCITING World of Arthropods!

Michele Humer

on 13 February 2011

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Transcript of Arthropods

Arthropods!! Prepare to Enter their EXCITING world!! Most diverse and successful animals of ALL time ~1 million species have been ID-ed =
more than 3X that of animals
Mite Tarantula Crayfish Includes insects, spiders, crabs, and cenitpedes Firefly Number of segments depends on group of arthropods tough, external covering made of chitin (protein) vary in shape and size "arthron-" means joint and "podos-" means foot Molting! allows arthropods to grow Groups of Arthropods Crustaceans Spiders insects Classified by # and structure of body segments and appendages 2 pair of antennae two or three body sections (cephalothorax and abdomen) mandibles examples include: crabs, shrimp, lobsters, crayfish, barnacles includes: horseshoe crabs, spiders, ticks, and scorpians two body sections Four pairs of walking legs Chelicerae fangsto stab and paralyze prey Includes: cenitpedes, millipedes, and insects Millipedes Centipedes highly segmented body
have two pairs of legs
timid creatures roll into ball body segments have one pair of legs
venomous claws Insects body divided into 3 parts (head, thorax, abdomen)
three pairs of legs Exoskeleton Segmented Body legs and antennae Jointed Appendages Arthropods' Body Structure
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