Only by dissecting can you really appreciate the structural and functional role of the many membranes, mesenteries, and connective tissues that will impede your progress every step of the way.
If the purpose of this exercise were simply to have you memorize diagrams (or computer screens), we would do only that and bypass the expense, time, and controversy of dissecting! Dissection is a powerful teaching method, especially for concrete thinkers and visual learners. With the possible exception of the abdominal cavity, organs rarely appear as they are presented in a diagram. Arteries (red) are injected through the umbilicus veins (blue) are injected through one of the jugular veins at the base of the throat. Following this, the arterial and venous systems are injected under pressure with latex, a rubber-like compound. The fetuses are removed from the sow and embalmed with a preservative, which is injected through the umbilicus. They are not raised specifically for dissection purposes. The fetuses you will use in the following weeks were salvaged from pregnant sows being slaughtered for food. Thus, a study of the fetal pig is in a very real sense, a study of humans.
As the pig is a mammal, many aspects of its structural and functional organization are identical with those of other mammals, including humans. In the following laboratory exercise, you will examine in some detail the external and internal anatomy of a fetal pig ( Sus scrofa). Mark Stanback fetal pig dissection pictures
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