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Arthropoda

Arthropods have a segmented body, a tough exoskeleton, and jointed appendages. Exoskeleton is make up of chitin- a protein and a carbohydrate. Arthropoda. CRUSTACEANS (lobsters, crabs, shrimp, crayfish, barnacles).

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Arthropoda

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  1. Arthropods have a segmented body, a tough exoskeleton, and jointed appendages. Exoskeleton is make up of chitin- a protein and a carbohydrate Arthropoda

  2. CRUSTACEANS(lobsters, crabs, shrimp, crayfish, barnacles)

  3. SPIDERS (Arachnids) and relatives(horseshoe crab, mites, ticks, scorpions)

  4. INSECTS(“bugs”, centipedes, millipedes)

  5. Environment • Crustaceans – mostly aquatic • Spiders and Insects – in all types of environments. Insect subphylum contains more species than ALL other groups of animals alive today • Food Source • Include herbivores, carnivores and omnivores • Their mouthparts have evolved in ways that enable different species to eat almost any food you can imagine

  6. Maintaining Homeostasis - Internal (Circulation, Respiration, Excretion) • Breath through a network of branching tracheal tubes, air enter and leaves the body through spiracles (small openings along the body) • Open circulatory system and a well developed heart • Waste leaves by Malpighian tubules- saclike organs that extract wastes from the blood and the add them to feces or digestive waste Maintaining Homeostasis – External (Response) • Have a brain, a well developed nervous system and sophisticated sense organs (eyes & taste)

  7. Movement • Well-developed groups of muscles that are coordinated and controlled by the nervous system. Reproduction • Some internal fertilization (land) • Some external fertilization (water) • Evolutionary Milestone • The evolution of arthropods, by natural selection, has led to fewer body segments, and highly specialized, jointed appendages for feeding, movement, and other functions.

  8. Picture and Vocabulary • Pictures Fig 28-5 p.718 Fig 28-15 p.727 Fig 28-18 p. 729 • Vocabulary: exoskeleton(715), appendage(715), molting719), metamorphosis (729)

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