Frog-dissection

Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. Vocabulary: anatomy, appendix, diaphragm, dissect, fertilize, heart, large intestines, lungs, lymph vessels, ovary, oviduct, ovisac, rectum, sternum, testis, vasa efferentia, vertebrae Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. Name some of the organs humans use to digest food. The mouth, esophagus, stomach, pancreas, liver, gallbladder, small intestine, and large intestine. 2. Do you think frogs have the same or different organs? Explain. I think that frogs will have mostly similar organs that are slightly different from ours but fulfill the same basic purposes. Gizmo Warm-up Scientists dissect (cut up) other organisms to learn more about their anatomy, or body structure. In doing so, scientists can also learn more about human anatomy. In the Frog Dissection Gizmo, you will complete a virtual dissection of a female and male frog. First, select the Female frog. Then click on the rotate button ( ). With the rotate button selected, click and drag on the frog to rotate it. Observe what the female frog looks like. Now select Show male at the bottom left to switch to the male frog. Rotate around the male frog to observe what it looks like. Click Show male and Show female to toggle back and forth between the two frogs. 1. Do you notice any differences between male and female frogs? Yes 2. Describe any differences you see. The female frog is larger and does not have the rough patches on its hands like the male frog does. Reproduction for educational use only. Public sharing or posting prohibited. © 2020 ExploreLearning™ All rights reserved Downloaded by Brian Muchoki () lOMoARcPSD| Activity A: Female frog anatomy Get the Gizmo ready: ● Select Show female (if not already selected). ● Click Reset female. Introduction: Inside the frog’s torso are organs that allow the frog to move, breathe, circulate blood, digest food, excrete waste, reproduce, respond to stimuli, and fight off infections. You will dissect a female frog and identify the organs involved in these processes. Question: How do you dissect a frog? 3. Dissect : Select the Scalpel tool and click on the frog. What happens? 3 slits are cut into the frog’s chest creating 2 flaps that will be opened with the forceps. 4. Dissect : Select the Forceps tool. Click on the skin and muscles a few times. What happens? The skin and muscles are peeled back to reveal the frogs internal organs. 5. Dissect : Pause for a few seconds. What happens to the skin and muscles? The skin and muscles keep closing back up and covering the innards of the frog. Pins are needed to hold the skin and muscles in place or else they might fold back onto the body. Use the forceps to pull the skin and muscles open again and then use the Pins tool to pin the skin and muscles down. (After selecting Pins, click on the skin and muscle flaps.) 6. Identify : Take a look at the skeletal system diagram at the right side of the Gizmo. Find the outline of the sternum. Do you see an organ in the frog’s chest on the left that looks like the sternum? Yes 7. Dissect : Select the Forceps. Click on and drag the sternum from the frog to the Skeletal system diagram. If you have dragged it into the correct position, the feedback below the diagram will say so. If there is a red outline, try again. 8. Dissect : 1. Carefully dissect all of the organs out of the frog’s chest and place them in the correct positions in the organ system diagrams on the right. Click on the Right and Left arrows at the top of the Skeletal system diagram to switch to other body system diagrams. Continue dissecting until you have filled in all of the diagrams. Hint: Don’t worry if you can’t complete an organ system diagram right away. Some organs are hidden behind other organs. If you place an organ in the incorrect position three times, a hint in the Gizmo will tell you which organ system the organ belongs to. Reproduction for educational use only. Public sharing or posting prohibited. © 2020 ExploreLearning™ All rights reserved Downloaded by Brian Muchoki (bmuchoki49@gmai