1. Insects-largest number of invertebrates Have three body parts –Head, thorax, abdomen –Antennae –May or may not have wings –Six legs attached to the thorax –exoskeleton

2. Insects Why are insects needed for the earth? 1.help to develop medicine 2. helps the chain of life 3.recyclers of the earth

3. Metamorphis Two kinds of metamorphis –Complete and incomplete –Egg, larva, chrysalis, adult

4. Incomplete Metamorphis Egg, small (aphid)or a nymph, and adult Nymph-small adult w/o wings Beetles are a great example

5. Why Study insects? Entomologists are? How many insects are there? 75% of all animals are insects!!

6. Insects are Arthropods Have jointed legs Exoskeleton Arthro-joints Poda-legs

7. Spiders/ticks Have two body parts: head abdomen Eight legs No antennae Exoskseleton Spinnerts Lobsters, scorpions