arthropods. body plans 3 main characteristics exoskeleton chitin can be hard or leathery can be hard...
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ArthropodsArthropods
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Body PlansBody Plans
3 main 3 main characteristicscharacteristics
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exoskeletonexoskeletonChitinChitinCan be hard or Can be hard or leatheryleathery
Used like armorUsed like armor
Molting for growingMolting for growing
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Jointed Jointed appendagesappendages
Arthro “joint”Arthro “joint”
Pod “foot”Pod “foot”
ex. Antennae, claws, ex. Antennae, claws, legs, wings, flippers legs, wings, flippers
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Segmented Segmented bodiesbodies
Insects –3Insects –3
Arachnids –2Arachnids –2
Centipedes 100Centipedes 100
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FeedingFeeding
Parasites, Parasites, carnivores, carnivores, filter filter feeders, feeders, herbivoresherbivores
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RespirationRespiration
Aquatic arthropodsAquatic arthropods
Gills just under Gills just under skeletonskeleton
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Book gills (horseshoe Book gills (horseshoe crab) and book lungs crab) and book lungs (spiders)(spiders)
Appearance is book likeAppearance is book like
Spiracle hole for air Spiracle hole for air entranceentrance
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InsectsInsectsSpiracle & Spiracle & Tracheal tubesTracheal tubes
Muscle movement Muscle movement pumps airpumps air
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Internal transportInternal transportOpen circulatory Open circulatory systemsystem
Blood out through Blood out through arteries & then arteries & then collect backcollect back
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ResponseResponseAll have ganglia All have ganglia brainbrainBody segments have Body segments have brainsbrainsWasp w/out head can Wasp w/out head can livelive
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Sophisticated Sophisticated sensessenses
Compound eyesCompound eyes
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Taste Taste receptorsreceptorsOn mouth On mouth antennae & antennae & legs (flies)legs (flies)
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MovementMovementSpider legsSpider legsfliesflies
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Growth & Growth & developmentdevelopment
Molting- shedding Molting- shedding small shellsmall shell
Vulnerable time w/ Vulnerable time w/ soft shellsoft shell
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MetamorphosisMetamorphosis
EggEgg
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LarvaeLarvae
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PupaPupa
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AdultAdult
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SubphylumsSubphylums
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Subphylum: Subphylum: ChelicerataChelicerata
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CharacteristicsCharacteristics2 body parts2 body parts
CephalothoraxCephalothorax
AbdomenAbdomen
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2 sets of appendages 2 sets of appendages on mouthon mouth
Chelicerae & Chelicerae & pedipalpspedipalps
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ExamplesExamples
Horseshoe crabsHorseshoe crabs
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ArachnidsArachnids
spidersspiders
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Mites & TicksMites & Ticks
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ScorpionsScorpions
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Subphylum: Subphylum: CrustaceaCrustacea
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Over 35,000 speciesOver 35,000 species
Water fleas .25mmWater fleas .25mm
Japanese spider Japanese spider crab 6 meters acrosscrab 6 meters across
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examplesexamples
Crabs lobster Crabs lobster barnacles crayfish barnacles crayfish shrimpshrimp
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CharacteristicsCharacteristics
Cephlothorax & Cephlothorax & abdomenabdomen
Hard exoskeletonHard exoskeletonCalcium carbonateCalcium carbonate
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2 pair of Antennae2 pair of AntennaeUsed for sensory Used for sensory feeding or locomotionfeeding or locomotion
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Mandible- mouth Mandible- mouth part for feedingpart for feeding
Short heavy Short heavy structurestructure
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appendagesappendages
Barnacles- filter Barnacles- filter feedingfeeding
Crabs lobster clawsCrabs lobster claws
swimmeretsswimmerets
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Subphylum: Subphylum: Uniramia Uniramia
Insects & friendsInsects & friends
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examplesexamples
Insects, millipedes, Insects, millipedes, centipedescentipedes
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CentipedesCentipedes
Carnivores w/ poisonCarnivores w/ poison
15-170 pairs of legs15-170 pairs of legs
Each segment has 1 Each segment has 1 pair of legspair of legs
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MillipedesMillipedes
ScavengersScavengers
2 pairs of legs per 2 pairs of legs per segmentsegment
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InsectsInsects
900,000 insect 900,000 insect speciesspecies
New species found New species found weeklyweekly
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BodyBody3 part body3 part bodyHead thorax & Head thorax & abdomenabdomen3 pairs of legs at 3 pairs of legs at thoraxthorax