The Grasshopper. Introduction Insects are arthropods with jointed appendages, segmented bodies, and...

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The Grasshopper

Transcript of The Grasshopper. Introduction Insects are arthropods with jointed appendages, segmented bodies, and...

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 - AnimaliaPhylum - Arthropoda

Class - InsectaOrder - 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 -

• 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.

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 UpDAY 1

• Biological material in plastic bag with class period & name. Place

on dissecting tray.

• Wash tools and return to table.

• Clean lab bench and table.

DAY 2

• Biological material in plastic bag and trash

bag.

• Dissecting tray in trash.

• Wash tools and return to table.

• Clean lab bench and table.

AssessmentLAB HANDOUT

• Pre-Lab Questions– Completed in class

• Anatomy Questions– Completed in class

• Analysis & Conclusion Questions– Distributed at the

end of the dissection to be completed for homework

DIAGRAMS

• External Features of the Grasshopper– Completed in class

• Specialized Features of the Grasshopper Head– Completed in class

• External Appendages of the Grasshopper– Completed in class

“Patience, young grasshoppers . . .

patience!”

A good dissection takes . . .