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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?