Homework: write in your planners

•Tuesday: finish mollusk sheet, study grasshopper for quiz

•Thursday: quiz on hopper parts and functions, no hw

Complex invertebrates

Classification

• What was the sentence to put the words in order?

• K• P• C• O• F• G• S

Remember from last unit….

• Simple Invertebrates are• Jellyfish (cnidarians)• Sponges and• Worms

Now, complex invertebrates

• Still do not have bones, but have some form of supporting structure

Mollusk

• 3 classes• Bivalve (clams

and oysters)• Cephalopod (squid

and octopus)• Gastropod (snail

and slug)

Echinoderms

• Means “spiny skinned”• Starfish• Sea Urchins

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

Arthropods

• More numerous than all other animal phylums combined!

Arthropods

• Segmented body with 3 sections• Head• Thorax• abdomen

Arthropods

• Successful, which means there are a lot of them

• In many areas of the world

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

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

1. Antenna

• Senses (touch, hear, taste, smell)• this is an adult black fly with an

antenna parasite

2. Head

• Made of hard nonliving material called……

• Chitin• 3. Thorax• 4. Abdomen

5. Wing

• Flying, • Communicate, • helps some

breathe

6. Spiracles• Holes in

abdomen for Breathing

7. Compound eye

• Sees; has 100’s of lenses

8. Simple eye

• Senses light• Cat flea only

has simple eye… why?

Just b/c it is cool

• Cat flea leg/foot

9. Tympanum

• Hearing (#7 in this picture

10. Mandible

• chewing

Mouthparts

Mouthparts

Rhinoceros beetle• How big is it?

Another view