Grasshopper Pre-lab Worksheet - Mr.E Science

Name: _______________________________ Date: ___________50 points possibleGrasshopper Pre-lab WorksheetThe following worksheet must be successfully completed before you start the actual dissection of thegrasshopper.Introduction1. What % of all animal species are insects? __________________________________2. Name the phylum for grasshoppers: __________________________________3. Name seven common characteristics of all arthropods:i. __________________________________________________________ii. __________________________________________________________iii. __________________________________________________________iv. __________________________________________________________v. __________________________________________________________vi. __________________________________________________________vii. __________________________________________________________4. What is the scientific name of the grasshopper we are dissecting? _______________________External Anatomy5. Name 4 functions of the exoskeletoni. ____________________________________ii. ____________________________________iii. ____________________________________iv. ____________________________________6. What’s the major disadvantage of an exoskeleton? __________________________________7. What is the major component of the exoskeleton? _____________________________8. Name the three distinct body regions: _____________, _______________ & ______________9. Identify these external features and describe their function/location:a. Compound Eye __________________________________________________b. Ocelli __________________________________________________c. Antenna __________________________________________________d. Labrum __________________________________________________e. Maxilla __________________________________________________f. Mandible __________________________________________________g. Palpi __________________________________________________h. Tympanum __________________________________________________i. Femur __________________________________________________j. Tibia __________________________________________________1 of 3

Name: _______________________________ Date: ___________Digestive System50 points possible24. Food is chewed up into smaller pieces and then moistened by _________________________25. What muscular organ manipulates the food for swallowing? __________________________26. Describe the path of food thru the digestive system:a. Mouth, _________, _____________, _____________, ______________,_______________, ________________ and anus. The __________________ secretedigestive enzymes into the stomach.Circulatory System27. What type of circulatory system does the grasshopper have?Excretory System28. What organs are used to remove nitrogenous wastes (urea)? ______________________Nervous System29. How many ganglions does the grasshopper brain have? ________________30. Does it have a dorsal or ventral nerve cord? ___________________________Reproductive System31. How do you tell the difference between the sexes?________________________________________________________________________________________________________________________________________________________The Actual Dissection1. From pg 4, you must __________________________ your grasshopper to figure 1.2. From pg 5, the use of ____________________________ will greatly aid in identifying mouthparts.3. From page 7, Internal Anatomy, In order to dissect what must first be removed? ____________4. What instrument is recommended to do this? ______________________5. What must next be done? _________________________________6. How many pins are recommended? ____________ What location? ____________________7. What abdominal segment do you begin your cut? ______________8. Describe the rest of the cut: ____________________________________________________________________________________________________________________________________________________________________________________________________________________9. What tool is used to remove the plates of the exoskeleton as they become free? _____________10. What type of tissue will come off w/ the exoskeleton? ____________________3 of 3