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Download The Eye - Methacton School District / Overview
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The Grasshopper Introduction •Insects 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. Characteristics • Insects 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. Adaptations • Insect 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. Life Cycle Simple Metamorphosis Classification Kingdom - Animalia Phylum - Arthropoda Class - Insecta Order - Orthoptera Lab Objective • Identify & label the external & internal anatomy of a grasshopper. Materials • goggles • dissecting pan • forceps • dissecting scissors • hand lens • plastic bag • preserved grasshopper Gloves can be provided, IF NEEDED!! Procedure • External Anatomy • HEAD • THORAX • ABDOMEN • Internal Anatomy • MUSCLES • BODY SYSTEMS Anatomical Terminology • Dorsal - Back or forward part. • Ventral - Abdominal or lower side. • Anterior - Forward or front part. • Posterior - Hind or rear part. • Median - Towards the middle. • Lateral - Side. Miscellaneous • Hand 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. Clean Up DAY 1 • Biological material in plastic bag with class period & name. Place on dissecting tray. DAY 2 • Biological material in plastic bag and trash bag. • Dissecting tray in trash. • Wash tools and return to • Wash tools and return to table. table. • Clean lab bench and table. • Clean lab bench and table. Assessment LAB HANDOUT • Data & Observations • Questions & Conclusions • Check for Understanding Questions DIAGRAMS • External Anatomy • Digestive System • Circulatory System • Respiratory System • Excretory System • Nervous System • External Features of the Grasshopper A good dissection takes . . . “Patience, young grasshoppers . . . patience!”
