2 IntroductionInsects are arthropods with jointed appendages, segmented bodies, and an exoskeleton composed of chitin. Insects are in the class Insecta, & are the largest and most diverse group of animals on earth.
3 CharacteristicsInsects have three body regions (head, thorax, & abdomen), 3 pairs of legs attached to the thorax, a single pair of antenna attached to the head, mouthparts adapted for chewing or sucking, and two pairs of wings. Some insects may have a single pair of wings or may be wingless.
4 AdaptationsInsect legs are often adapted for digging, crawling, jumping, or swimming. Insects are mostly terrestrial and breathe air which enters small lateral openings on the body called spiracles and circulates in a system of ducts to all organs and tissues. Their chewing or sucking mouth parts are adapted for feeding on plant or animal materials.
7 ClassificationKingdom - Animalia Phylum - Arthropoda Class - Insecta Order - Orthoptera
8 Lab ObjectiveIdentify & label the external & internal anatomy of a grasshopper.
9 Gloves can be provided, IF NEEDED!! Materialsgogglesdissecting panforcepsdissecting scissorshand lensplastic bagpreserved grasshopperGloves can be provided, IF NEEDED!!
10 Procedure External Anatomy Internal Anatomy HEAD THORAX ABDOMEN MUSCLESBODY SYSTEMS
11 Anatomical Terminology Dorsal -Ventral -Anterior -Posterior -Median -Lateral -Back or forward part. Abdominal or lower side. Forward or front part. Hind or rear part. Towards the middle. Side.
12 MiscellaneousHand sanitizer will be provided for use at the end of the dissection.Students should wash their hands with soap and water prior to eating lunch.Please bring any injury sustained during the dissection to the attention of an adult immediately.
13 Clean UpDAY 1Biological material in plastic bag with class period & name. Place on dissecting tray.Wash tools and return to table.Clean lab bench and table.DAY 2Biological material in plastic bag and trash bag.Dissecting tray in trash.Wash tools and return to table.Clean lab bench and table.
14 Assessment LAB HANDOUT Data & Observations Questions & Conclusions Check for Understanding QuestionsDIAGRAMSExternal AnatomyDigestive SystemCirculatory SystemRespiratory SystemExcretory SystemNervous SystemExternal Features of the Grasshopper
15 “Patience, young grasshoppers . . . patience!” A good dissection takes . . .