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Homework: write in your planners
•Tuesday: finish mollusk sheet, study grasshopper for quiz
•Thursday: quiz on hopper parts and functions, no hw
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Complex invertebrates
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Classification
• What was the sentence to put the words in order?
• K• P• C• O• F• G• S
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Remember from last unit….
• Simple Invertebrates are• Jellyfish (cnidarians)• Sponges and• Worms
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Now, complex invertebrates
• Still do not have bones, but have some form of supporting structure
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Mollusk
• 3 classes• Bivalve (clams
and oysters)• Cephalopod (squid
and octopus)• Gastropod (snail
and slug)
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Echinoderms
• Means “spiny skinned”• Starfish• Sea Urchins
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ARTHROPODS
• Insect ( 6 legs)• Arachnid (8 legs)
spider, tick• Crustacean ( 10
legs) lobster• Centipede (1 pair
legs per segment)• Millipede (2 pair of
legs per segment
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Arthropods
• More numerous than all other animal phylums combined!
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Arthropods
• Segmented body with 3 sections• Head• Thorax• abdomen
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Arthropods
• Successful, which means there are a lot of them
• In many areas of the world
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Exoskeleton
• On the outside, like a suit of armor• Nonliving, made of CHITIN• Protects from drying out, being eaten,
and a place for muscles to attach• Legs bend: JOINTED; allows greater
movement
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Molting
• grow new skin, Shed old skin, • Grow new “skin” underneath, split
old exoskeleton, crawl out, puff up, let it dry
• http://cache.eb.com/eb/image?id=91402&rendTypeId=4
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1. Antenna
• Senses (touch, hear, taste, smell)• this is an adult black fly with an
antenna parasite
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2. Head
• Made of hard nonliving material called……
• Chitin• 3. Thorax• 4. Abdomen
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5. Wing
• Flying, • Communicate, • helps some
breathe
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6. Spiracles• Holes in
abdomen for Breathing
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7. Compound eye
• Sees; has 100’s of lenses
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8. Simple eye
• Senses light• Cat flea only
has simple eye… why?
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Just b/c it is cool
• Cat flea leg/foot
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9. Tympanum
• Hearing (#7 in this picture
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10. Mandible
• chewing
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Mouthparts
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Mouthparts
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Rhinoceros beetle• How big is it?
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Another view