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PHYLUM ARTHROPOD

Arthropod. 3/4 of all animal species belong to Phylum Arthropodaexamples include: insects, spiders, lobsters, and centipedes. Basic characteristics of arthropods. Have jointed appendagesbody is segmentedpair of appendages is attached to each segmenthave an exoskeletonhave a ventral nervous sys

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PHYLUM ARTHROPOD

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    1. PHYLUM ARTHROPOD “Jointed foot”

    2. Arthropod 3/4 of all animal species belong to Phylum Arthropoda examples include: insects, spiders, lobsters, and centipedes

    3. Basic characteristics of arthropods Have jointed appendages body is segmented pair of appendages is attached to each segment have an exoskeleton have a ventral nervous system, open circulatory system, digestive system, and specialized sensory receptors reduced competition through metamorphosis

    4. Movement and Growth Muscles occur in bundles and operate as levers ecdysis (molting) - shedding of exoskeleton tissues grow, putting pressure on the exoskeleton, then a hormone induces the shedding process extremely vulnerable to predators and dessication during this time

    5. Evolution and Classification Because of exoskeleton, they all have a common ancestor have evolved into four separate lines of arthropods

    6. 4 separate lines of arthropods 1) Trilobita: includes extinct organisms called trilobites 2) Crustacea: includes shrimp, lobsters, crayfish, water fleas, crabs have branched antennae and mandibles

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