First, you must cut through the thin, moist epidermis. This is the skin that covers the body. The frog will be lying with its ventral side facing up. You will begin your cut between the legs at the cloaca and continue up to the lip. Next, you will see a layer of muscles once you have cut through the skin. You must cut through these. In the chest area, above the heart, is the breastbone. This must be cut through as well, so that you can view the heart and lungs beneath it. Therefore, the three things are the skin, muscle tissue and bone which must be cut through, in order to view the visceral organs.There is an additional membrane, the peritoneum, that covers the internal organs. This must be carefully removed in order to clearly view the frog's organs.
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