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Version:1.0 StartHTML:0000000197 EndHTML:0000032471 StartFragment:0000002608 EndFragment:0000032435 SourceURL:file://localhost/Users/11emiloy/Downloads/Grasshopper%20Prelab%20Information.doc Grasshopper Pre-lab Worksheet The following worksheet must be successfully completed before you start the actual dissection of the grasshopper. **Introduction** 1. What % of all animal species are insects? _____75_____________________________   2. Name the phylum for grasshoppers: ____________Arthropod______________________ 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 Anatomy** 5. Name 4 functions of the exoskeleton i. ____________________________________ 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 __________________________________________________ Name: _______________________________ Date: ___________ 50 points possible 2 of 3 k. Tarsus __________________________________________________ l. Spiracles __________________________________________________ m. Ovipositor ______________________________________________ **Internal Features** 10. Identify these internal features and describe their location, appearance and function: a. Brain __________________________________________________ b. Ventral nerve cord ________________________________________________ c. Mouth __________________________________________________ d. Esophagus __________________________________________________ e. Crop __________________________________________________ f. Stomach __________________________________________________ g. Gastric Ceca __________________________________________________ h. Intestine __________________________________________________ i. Rectum __________________________________________________ j. Anus __________________________________________________ k. Malpighian Tubules _________________________________________________ **The Head** 11. How many segments is the head actually made up from? ______________________   12. Food is manipulated by what “tongue-like” organ? _________________________________   13. What are the types of eyes? ______________________ and _________________________ 14. What antenna are sensory structures for which two senses? ____________ & _____________   **The Thorax** 15. How many segments is the thorax made from? ____________________   16. How many joints/segments does each leg have? __________________   17. What structure is used by the male to produce mating calls? ___________________________   **The Abdomen** 18. How many segments is the abdomen made from? ______________________   19. What is the female egg laying structure called?______________________________________ **Respiratory System** 20. What is the respiratory system of the grasshopper called? ____________________________   21. What is the series of tubes used to distribute the air called?_____________________________ 22. The Tracheal System begins w/ ___________________________ 23. Can Grasshoppers pump air into the spiracles? ________________________   Name: _______________________________ Date: ___________ 50 points possible **Digestive System** 24. 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 __________________ secrete digestive enzymes into the stomach. **Circulatory System** 27. What type of circulatory system does the grasshopper have? **Excretory System** 28. What organs are used to remove nitrogenous wastes (urea)? ______________________   **Nervous System** 29. How many ganglions does the grasshopper brain have? ________________   30. Does it have a dorsal or ventral nerve cord? ___________________________   **Reproductive System** 31. How do you tell the difference between the sexes? ____________________________________________________________________________   ____________________________________________________________________________

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