This document provides instructions for a frog dissection pre-lab. It includes questions about frog anatomy and physiology. Students are asked to identify the kingdom and class that frogs belong to, and characteristics that all chordates share. They are also asked to identify the organs of the frog and their functions, describe how frogs breathe and reproduce, and explain the purpose of certain membranes and structures. Links to online resources on frog anatomy and dissection are provided for additional reference.

1. Frog Dissection Pre-lab pg. 782-792
You will have to read thoroughly to find the answers
Names: ___________________________________________________________________________
Date: ____________________________________________________________________________
1. Kingdom ______________
2. Class ________________
3. What characteristics do all chordates share?(767)
4. What are the two groups of non-vertebrate chordates? (769)
5. Why are frogs said to have “two lives?”(782)
6. How are amphibians different from reptiles? (search ch. 30 and 31)
7. What are 3 adaptations that frogs have?
8. What’s the difference between what tadpoles and adult frogs eat?(784)
9. Since frog lungs are poorly developed, what else do frogs do to breathe?
(784)
10. How do frogs reproduce?(786)
11. Do frogs take care of their young?(786)
12. What is the purpose of the nictitating membrane?(786)
13. What is the purpose of the tympanic membrane?(786)
14. How do frogs retract their eyes?

2. Names: ___________________________________________________________________________
Date: ____________________________________________________________________________

3. Instructions for following page:
Use your glossary to find the functions of the following organs.
***Please color code the parts.
A. Esophogus (yellow)_____________________________
___________________________________________
C. Stomach (purple)________________________________
___________________________________________
D. Pancreas (orange)_______________________________
____________________________________________
F. Cloaca (black)__________________________________
___________________________________________
H. Lung (dark blue)___________________________________
___________________________________________
I. Heart (red)__________________________________
__________________________________________
J. Liver (brown)__________________________________
___________________________________________
K. Gallbladder (lt. green)_______________________________
___________________________________________
L. Small Intestine (Dark green)___________________________
_____________________________________________
M. Large Intestine (lt. blue)____________________________

4. http://zerobio.com/videos/frog_dissection2.htm (video)
http://www.frog-life-cycle.com/diagram-frog-anatomy.html (part)
http://www.biologycorner.com/worksheets/frog_external.html(worksheet)
http://www.biologyjunction.com/frog_dissection.htm
http://www.mhhe.com/biosci/genbio/virtual_labs/BL_16/BL_16.html
(vitual lab)