Frog Dissection Wkst.

 

Go to the following website: http://curry.edschool.virginia.edu/go/frog/Frog2/home.html

 

1.      Why are we going to dissect frogs?  _________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________

 

2.      Select “Begin Dissection”

 

Read the instructions and answer the following questions as you continue through the entire dissection.  Pay careful attention to the instruction and make sure you complete every “Try It” exercise.  Also, look at the facts in the areas titled “Guess What?”.

 

 

3.      The steps of the dissection are listed below, fill in the blanks with the title of each step from the virtual dissection and answer the question.

 

Set-up 1: ______________________ 

 

Why were amphibians named “Both water and land” ?  (HINT: See Guess What?)

____________________________________________________________________________

____________________________________________________________________________

 

 

Set-up 2: ______________________

 

In which part (s) of the frog do you put the pins? _____________________________________             

 

Incision 1: _____________________

 

What are forceps? _____________________________________________________________

____________________________________________________________________________

 

 Incision 2: ____________________

 

How do you tell the difference between frogs and toads? ______________________________

 

____________________________________________________________________________

 

 

Incision 3: _____________________

 

Complete the “Try it!” activity

 

 

Incision 4:_____________________

 

Incision 5: _____________________

 

When you reach which part of the frog is your cutting complete? ________________________

 

____________________________________________________________________________

 

 

Incision 6: _____________________

 

 

Incision 7: _____________________

 

Frogs ears are called tympanum, where are they located? ______________________________

 

____________________________________________________________________________

 

 

Incision 8:______________________

 

Complete the “Try it!” activity

 

4.      The Organ Section of the virtual dissection contains 19 steps.  Answer the following questions as you complete the remainder of the dissection.   If you continue through every step and complete all “Try it!” activities and “Guess What” icons, you should find every answer.

 

Pay careful attention to the location of each organ by moving your cursor over the pictures in each section.  You will be seeing the same things in your dissection.

 

 

1. During the dissection, you will look at organs in ____________ different layers.

 

2. Why don’t frogs organs freeze in the winter? _______________________________________

 

____________________________________________________________________________

 

3. The large brownish organ that covers the majority of the body cavity is called the _____________________

 

4. How many chambers does a frog’s heart contain? ______________ Human? _____________

 

5. Why do frogs have front teeth? _________________________________________________

 

6. Describe the Gall Bladder _____________________________________________________

 

7. Where is the Gall Bladder located? ______________________________________________

 

8. The small intestine is located ___________________ to the stomach.  It is similar to the stomach but _______________ in diameter.

 

9. How much oxygen do frogs get through their skin? _________________________________

 

10. Where are the lungs located? ___________________________________________________

 

11. Describe the pancreas _________________________________________________________

 

12.  What is the function of the spleen?_______________________________________________

 

13. Describe the kidneys___________________________________________________________

 

14. How do male frogs fertilize the females eggs?_______________________________________

 

_______________________________________________________________________________

 

15. How many eggs does a female frog release? ________________________________________

 

16. What are the three Clean-up steps?

 

                                                   i.      __________________________________________________________________

 

                                                 ii.      __________________________________________________________________

 

                                                iii.      __________________________________________________________________

 

 

Now that you have completed the virtual dissection, Label the frog organs below.  (If necessary, find the information on the website you just finished.)

 

Word Bank: 

Kidney	Heart	Lung	Stomach	Large intestine
Small intestine	Liver	Pancreas	Cloaca

 

 

 

 

 

 

Mixed-Up Cut-up

 

Directions: The following 12 items describe the steps of a frog dissection.  However, they are currently out of order.  Your job is to place the items in the correct order.  In the blank space next to the left of each item, place its correct number (from 1 through 12).  This is only a partial list – not all of the steps for dissecting frogs are listed here.

 

_________ 1.  Separate the muscle tissue from the organs that lie beneath it.

_________ 2.  Cut through the frog’s skin

_________ 3.  Examine the lungs

_________ 4.  Rinse the frog in water

_________ 5. Separate the frog’s skin from the muscle layer beneath it

_________ 6. Lift up the liver so that you can see the gall bladder, stomach,

and small intestine

_________ 7.  Cut through the muscle layer

_________ 8.  Remove the stomach, small intestine, and pancreas in order to

see the spleen,  kidneys and reproductive organs

_________ 9.  Pin the frog’s four limbs to the dissecting pan.

_________ 10.  Place the frog on its back in the dissection pan

_________ 11.  Remove the liver, heart, and gall bladder

_________ 12.  Locate the liver and heart

 

 

Web-Quest

 

A Web-Quest is like a scavenger hunt on the Internet.  As a user of a WebQuest, your task is to surf the Web in search of answers to challenging questions. Use Net Frog's interactive dissection and the Web site  http://www.lookd.com/frogs/anatomy.html  to complete this Web-Quest.  

1.      How does the frog heart differ from the human heart?

 

2.      How does the frog get oxygen?

 

 

3.      What purpose does the pancreas serve?

 

 

4.      What purpose do the kidneys serve?

 

 

5.      Look at the reproductive organs of the male and female frogs. How are they the same/different?

 

 

6.      What organs and muscles does a frog use to catch, eat, and digest its food?

When finished access the following site and do all the Practice Tests (Frog Tests 1, 2, 3 & 4).

http://biologycorner.com/frog/review.html