Frog Dissection Lab Sheet #1: Pre/Post Questions Refer to the Frog Dissection Instructions packet (online) to answer the questions on this sheet.

Part A: Introduction 1. What class does the frog belong to? 2. Why does a frog belong to that class? 3. Why are amphibians considered to be a unique evolutionary group?

Part B: External Anatomy 4. Why is your frog stiff and not limp like many dead animals you may have encountered? Explain.

5. Why does a frog produce toxins in its skin? 6. Why does a frog look green even though it contains no green pigments?

Part C: Head & Mouth Anatomy

7. Where does the tongue attach to the mouth?

Structure Function 8. External/internal nares 9. Nictitating membrane 10. Tympanic membrane 11. Tongue 12. Vomerine teeth 13. Maxillary teeth 14. Eustachian tube 15. Gullet opening 16. Glottis 17. Label the following mouth structures on the diagram. Be prepared to locate these on your frog during lab.

Part D: Organs of the Body Cavity Describe, locate & state the function of each of these internal structures. Be prepared to locate these on frog.

Structure Description (color, shape, texture) Orientation Function 18. fat bodies

19. peritoneum

20. heart

21. lungs

22. liver

Name

1.

2.

3.

4.

5.

6.

7.

23. gall bladder

24. esophagus

25. stomach

26. small intestine

27. mesentery

28. pancreas

29. spleen

30. kidney

31. large intestine

32. testes

33. ovary

34. oviduct

35. eggs Urogenital Systems. Identify the names of the structures be low for both male & female frogs. Part E: Conclusion 36. How does the frog dissection show and support the idea that an organism is adapted to getting nutrients,

getting rid of wastes and reproducing in its environment? Give 2 specific examples from the lab.

37. Describe 3 interesting facts about amphibians that you now know as a result of doing this lab.

38. Identify and describe 2 external features that frogs have in common with humans. a. b.

39. Identify and describe 2 internal features that frogs have in common with humans. a. b.

40. Identify and describe 2 features that frogs DO NOT have in common with humans. a. b.

A.

B.

C.

D.

E.

F.

G.

H.

I.

J.

K.

L.

M.

N.

O.