<p> Arthropods – notes Major Groups 1. Arachnids - ______and their relatives of Arthropods 2. Crustaceans – ______, shrimp, and crayfish 3. ______“jointed foot” 4. Millipedes 5. ______and their relatives – grasshopper, cricket, roaches, beetles, etc</p><p>Common Largest group of animals Characteristics Many are highly social of ALL 1. Have ______appendages which include legs, antennae, claws and pincers Arthropods 2. Have ______symmetry, segmented bodies, exoskeletons, a body cavity, a digestive system with two openings and an advanced nervous system -Most have separate sexes and reproduce sexually 3. Body ______ Bodies of these animals are divided into specialized segments 4. ______A hard outer covering that supports and protects the internal body and provides places for muscle to attach.  Doesn’t ______as the animals does, it is shed and replaced during a process called molting Advantages Disadvantages 1. ______1. Must molt as animal grows 2. prevents dessication 2. limits______of animal Arachnids • Have ______body regions – Cephalothorax and an abdomen • ______pairs of legs and no antennae • Many are adapted to kill ______with poison glands, stingers, or fangs • Some are parasites ______– Have sharp, poison filled stinger at the end of abdomen. – Have a well-developed appendages which they can grab their prey. ______– Can’t chew their food, release enzymes into prey to digest it—then suck the predigest liquid into its mouth. – Have book lungs where O2 and CO2 are exchanged.</p><p>______and ______-- Most are parasites – Ticks have specialized mouthparts to remove blood from the host. – Ticks often carry disease such as Lyme disease. Centipedes and • Have long bodies and many ______, exoskeleton, jointed legs, antennae and Milipedes simple eyes. • Found in ______environments • Reproduce sexually - Centipedes are ______- Millipedes feed on decaying ______matter.</p><p>Crustaceans • Have one or two pair of ______and mandibles, which are used for crushing food. • Most live in ______, but some live in moist environments on land—such as pill bug. • Have ______pair of legs, first pair of legs are claws for catching and holding food Insects • Have ______body regions - ______- Has a pair of antennae, eyes and a mouth - ______- Three pairs of legs and one or two pairs of wings if present are attached here - ______- Where reproductive structures are found.</p><p>• ______symmetry- cephalization, and well developed nervous systems • Have an ______circulatory system that carries digestive food to cells and removes wastes • Insect blood doesn’t carry O2 instead air enters and exits through openings called ______found on the abdomen and thorax • Are the only invertebrate animals that can ______The success of • Insects are extremely successful based these reasons Insects – Tough flexible, waterproof ______– Ability to______– ______reproduction cycles – Small sizes – Use a variety of ______sources • Insects have other adaptations that allow them to be successful</p><p>Value of • A source of ______Insects • Agriculture would be impossible without bees and other insects to ______crops • Useful chemicals are obtain from some arthropods • Important part of ecological community Review!</p><p>Practice! Name the phyla each of these organisms belong Tapeworm ______Hydra ______Score: _____/ 12 Earthworm ______Heartworm ______Jelly Fish ______Crocodile ______Sea Star ______Sponge ______Octopus ______Clam ______Ant ______Crab ______</p><p>Practice! Name the phyla each of these describe Has a backbone ______Score : ______/8 First with true tissues ______Has no true tissues ______First with a one-way digestive tract ______Has jointed appendages ______First with a closed circulatory system ______First phyla to show bilateral symmetry ______Water Vascular System ______</p>