Grasshopper External Anatomy WS

Grasshopper Appendages Lab WS: Name: ______

Label the picture below: Ovipositor, Head, Thorax, Abdomen, Prothorax, Mesothorax, Metathorax, Antenna, Compound Eye, Labrum. Palp, Coxa, Trochanter, Tarsus, Claw, Femur, Tibia, Fore Wing, Hind Wing

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Label the Head and Mouthparts as best you can in the picture below: Labrum, Mandibles, Labial palps, Labium, Maxillary Palps, Maxillae, Compound Eye, Ocelli, Antenna

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Table 1 Measurements: Find the measurement of each part (mm) Body Part Length (mm) Body Part Length (mm) Femur (jumping leg) Femur (walking leg) Tibia (jumping) Tibia (walking) Tarsus (jumping) Tarsus (walking) Antenna Thorax Abdomen Palps Forewing Hindwing Table 2: Appendages – Remove and draw each appendage. Be ready to identify them.

Antenna Forewing

Labrum Hindwing

Mandible Walking Leg

Maxilla or Labium Palp Jumping Leg

Questions: 1. Which region of the insect's body is specialized for sensory functions? Explain your answer.

2. Which region of the insect's body is specialized for movement & explain why?

3. What is the purpose of compound eyes? of simple eyes?

4. What do you think the functions of the mandible and maxilla are? What about the palps?

5. How are the ends of the legs adapted for holding onto plants?

6. How is the third pair of legs adapted for jumping?

7. How many segments are in the abdomen?

8. Find the forewing and hind wing. When closed, which one is on top?

9. What part of the thorax is the forewing attached to? What about the hindwing?

10. What part of the body is each leg attached to? Be specific. a. 1st walking leg: b. 2nd walking leg: c. Jumping leg: 11. Locate your tympanum. What do you think the function of the tympanum is?

12. What system do spiracles open into on a grasshopper? 13. Do all abdominal segments have spiracles? Are there any spiracles on the thoracic segments?

14. What is the sex of your grasshopper? How do you know?