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Virtual Frog Dissection – Day One
Name: _______________________
Mrs. Gardner
To do the virtual frog dissection, you will need to start here:
http://frog.edschool.virginia.edu/Frog1/menu.html
Click on the “Introduction” tab, and list here the materials/tools that you will be using
during this virtual dissection. These are basically the same tools that we will be using in
the classroom.
List of tools:
If you read to the bottom of this page, you’ll see that there also icons for places
throughout the dissection where you can see Quicktime videos and where you can
practice what you’re learning on-screen.
Now return to the Main Menu.
On the “Preparations” tab, read through to see how we initially prepare and setup the
frogs so that they are ready to be dissected.
This is all you’re going to do from this website today, as today in class, students will be
removing the skin from one of the legs, and removing the quadriceps muscle along with
the attached tendons.
Instead, I’d like you to do a little research about the life of a frog by clicking here:
http://animals.about.com/od/frogstoads/ss/lifecyclefrog_2.htm
What are the three stages in a frog’s life, and tell a little bit about each. When you’re
done with this writing, feel free to browse through the links associated with this second
page.
Stage One:
Stage Two:
Stage Three:
Virtual Frog Dissection – Day Two
Today, we’re going to open the frog up and take a look inside.
http://frog.edschool.virginia.edu/Frog1/skin/home.html
Read through the above page to see how you would make the skin incisions (the
shallow cuts through only the skin of the frog).
Describe briefly the steps you need to take to make these skin incisions:
Then go back to the Main Menu, and click on “Muscle Incisions”; these cuts are
basically the same as through the skin, only a bit deeper so that they cut through the
chest and abdominal walls. Describe them here:
Again, back to the Main Menu, and now click on “Internal Organs”. Today, we’re only
going to get to “Layer One”, so click on this.
http://frog.edschool.virginia.edu/Frog1/organs/Layer1/home.html
Which two organs are considered to be in the first layer?
All I can tell you from this first layer, is that these pictures don’t do justice to the size of
the frogs’ liver. Just as in humans, the liver is the largest internal organ, and in our
frogs the liver is huge; maybe theirs are a different variety of frog.
Describe the liver:
Describe the heart:
Virtual Frog Dissection – Day Three
Today in class, we’re going to remove the heart and liver, and take a look at the lungs
which are just behind the heart. We will also be taking a look and talking about the
lungs. You, today, will be looking at Layer Three here
http://frog.edschool.virginia.edu/Frog1/organs/Layer3/home.html
Briefly describe the lungs:
Below the lungs is a large, J-shaped organ called the __________________. The
stomach is attached to the lower end of the esophagus, and the upper end of the small
intestine.
Describe the stomach:
In class, we’ll cut open the stomach to see if there are any preserved remains.
Sometimes there are insect carcasses, legs or shells.
What small greenish organ is located just below the liver? __________________
What’s stored in this little organ?
The pancreas is an organ that connects near the top of the small intestine.
Describe the pancreas:
The small intestine is connected to the lower end of the stomach. It is a tan-colored
organ, much narrower and longer than the stomach, that loops around itself multiple
times. The small intestine is connected to the large intestine, which is where waste
material is stored before it leaves the body.
Now we’re ready to look at the sex organs in frogs, and Layer Four. Click here:
http://frog.edschool.virginia.edu/Frog1/organs/Layer4/home.html
Click on the link that takes you to the female frog.
Virtual Frog Dissection – Day Four
This is our last day of dissection. Today, you’ll be looking at the kidneys, the spleen,
and the sexual organs.
Describe the spleen:
Describe the kidneys:
Describe the ovaries and oviducts (in a female frog):
Now go back to the Layer 4 screen, and pick the male frog.
Describe the testes (testicles) in the male:
Here is another frog dissection site
http://www.aa.psu.edu/biology/frog/default.htm
I’m considering rewriting this Virtual Frog Dissection in order to use this other site, and
am interested in your feedback. Scroll through this 2nd site and tell me briefly which site
you think is a better learning tool for doing virtual frog dissection, the original site or this
2nd site.
You’re done with the frog… Now I’d like you to take a look at a pig dissection by
clicking here:
http://www.whitman.edu/biology/vpd/main.html
Move around the site, and write a little bit about what you see. Compare and contrast
the frog dissection that you just completed, with the pig dissection. Similarities?
Differences?