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