1. The Grasshopper Click here

2. Arthropods Insects There are more than 700,000 species that have been classified They are the largest & most diverse group on earth Insects have three body regions Head, thorax, and abdomen

3. Dissecting

4. Mouth parts Mandibles- holding food Labrum- holding food Maxillae- chewing food Labium-holding food and tasting

5. Head Antennae Eyes ( simple) Mouth ( adapted so they can chew plants) They have crop and gizzard for grinding food

6. Thorax Three pair of legs (Legs are adapted for jumping to escape predators) One or two pair of wings – Some insects only have wings part of their life, or not at all

7. Abdomen Where the reproductive structures are found Insects have an open circulatory system and their blood DOES NOT carry oxygen They have spiracles instead- where air enters and waste gas leaves the body (oxygen & CO2)

8. Kingdom Animalia- Phylum Arthropoda- Class Insecta Order Orthoptera Class Insecta

10. Head Antennae (two, slender appendages) Compound eyes (2, large lateral) Ocelli (or simple eyes) - 3, small, between compound eyes Mouth parts - Labrum (upper lip), mandibles (jaws) below the labrum, maxillae located behind the mandibles to help cut & hold food, and the lower lip or labium

12. Tympanic membrane

14. ABDOMEN Spiracles (small openings on the side of somites or body segments) Auditory Organs (two located laterally on the 1st body somite or segment) Ovipositor (on female)

15. Ovipositor

17. THORAX Legs (first 2 pairs are for walking & the last pair are for jumping) Wings (forewings have a leathery appearance & protect the hind wings)