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What is an Insect?What is an Insect?
Is there truly a difference Is there truly a difference among bugs, arachnids, among bugs, arachnids, crustaceans, and insects?crustaceans, and insects?
What classifies as an What classifies as an insect? Do you know?insect? Do you know?
Class DiscussionClass Discussion
What criteria is needed to What criteria is needed to classify an insect?classify an insect?
What do you think?What do you think?
Three-Part BodyThree-Part Body
Insects have a three-part Insects have a three-part body which consists of a body which consists of a head, thorax, and abdomen. head, thorax, and abdomen.
This means that the ant This means that the ant isis an an insect.insect.
ArthropodsArthropods
Insects are arthropods, meaning Insects are arthropods, meaning they have a chitinous they have a chitinous exoskeleton.exoskeleton.
Even with the exoskeleton, the Even with the exoskeleton, the crab crab is not is not classified as an classified as an insect. The crab is a crustacean.insect. The crab is a crustacean.
Six LegsSix Legs
All insects have three pairs of All insects have three pairs of jointed legs. jointed legs.
The spider has eight legs. The spider has eight legs. This means it This means it is not is not an insect. an insect. A spider is an arachnid. A spider is an arachnid.
Two AntennaeTwo Antennae
Insects have two antennae Insects have two antennae which they use for sensing.which they use for sensing.
YesYes, a bee , a bee isis an insect. The an insect. The bee has a three-part body, bee has a three-part body, six legs, and antennae.six legs, and antennae.
It’s a bug! Right?It’s a bug! Right?
The “Lady Bug” or The “Lady Bug” or Coccinellidae is related to a Coccinellidae is related to a beetle.beetle.
They have antenna, six legs, They have antenna, six legs, and a hard shell that covers and a hard shell that covers their wings.their wings.
YesYes, a Lady bug , a Lady bug isis an insect! an insect!
Compound EyesCompound Eyes
Insects have compound eyes. Insects have compound eyes.
Compound eyes help them to Compound eyes help them to view very large angles.view very large angles.
YesYes, the fly , the fly isis an insect. an insect.
Photo ReferencesPhoto References
http://img.dailymail.co.uk/i/pix/2007/08_01/antDM0208_468x337.jpg Ant Ant
http://tokyo5.files.wordpress.com/2009/11/http://tokyo5.files.wordpress.com/2009/11/redback.jpg Spiderredback.jpg Spider
http://www.insectidentification.org/imgs/http://www.insectidentification.org/imgs/insects/honey-bee.jpg Honey Beeinsects/honey-bee.jpg Honey Bee
http://www.evangelchristianschool.org/http://www.evangelchristianschool.org/news/wp-content/uploads/2008/12/crab1.jpg news/wp-content/uploads/2008/12/crab1.jpg Crab Crab
Photo ReferencesPhoto References
http://www.vectair.co.uk/UserFiles/images/http://www.vectair.co.uk/UserFiles/images/3512101208insect.jpg Fly3512101208insect.jpg Fly
http://www.mediagiantbomb.com/uploads/http://www.mediagiantbomb.com/uploads/0/5768/553534-ladybug_large.jpg 0/5768/553534-ladybug_large.jpg LadyBugLadyBug
http://www.nicksspiders.com/insects/http://www.nicksspiders.com/insects/anatomy.jpg anatomy.jpg AnatomyAnatomy
http://en.wikipedia.org/wiki/Insect http://en.wikipedia.org/wiki/Insect InformationInformation
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