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Published byMyra Dean Modified over 9 years ago
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Kendal Meharg September 2010
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Lots of creatures get lumped into the category of creepy-crawlies….. Insects Arthropods Crustaceans Arachnids But what does it mean to be an insect??
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Six Legs (3 pairs of jointed legs) A body divided into a head, thorax and abdomen An exoskeleton Two antennae
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Insects can only have 6 legs No more no less! Insects must have two antenna Spiders are arachnids not insects.
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Ants fulfill all the requirements of an insect: Six legs Body divided into: head, thorax and abdomen Two antenna Exoskeleton
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Centipedes have too many legs! There bodies are not divided up into a head, thorax and abdomen Although they are sometimes grouped into the category of insects; centipedes are arthropods.
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Crabs are crustaceans They have an exoskeleton, however they have more than 6 legs and don’t have antenna
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The cockroach had exactly six legs Its body is divided into 3 parts: head thorax and abdomen And Cockroaches have an exoskeleton: this is why they crunch and squish when you step on them!!
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If a creature has: Six Legs (3 pairs of jointed legs) A body divided into a head, thorax and abdomen An exoskeleton Two antennae Then it’s an Insect!
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Spider: http://mlguide.blogspot.com/2010/07/spiders-of-baja- baja-califorina-guide.html Ant: http://wild-facts.com/2010/01/19/wild-fact-894- family-matters-argentine-ants/ Centipede: http://www.desertusa.com/animals/centipede- bites.html Crab: http://www.provokator.org/articles/study-fiddler- crabs-exchange-sex-survival Cockroach: http://animals.howstuffworks.com/insects/cockroach. htm/printable
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