textbook preserved fetal pig (double injection)
dissecting tray dissecting instruments twine plastic bag identification tag disposable gloves bone shears human torso human upper and lower limb models
• Wear disposable gloves when working on the fetal pig dissection.
• Dispose of tissue remnants and gloves as instructed.
• Wash the dissecting tray and instruments as instructed.
• Wash your laboratory table.
• Wash your hands before leaving the laboratory.
Although the aim of this exercise is to become more familiar with the human musculature, human cadavers are not always available for dissection. Instead, preserved fetal pigs often are used for dissection because they are relatively small and can be purchased from biological suppliers. Also, as mammals, pigs have many features in common with humans, including similar skeletal muscles (with similar names).
On the other hand, pigs make use of four limbs for support whereas humans use only two limbs. Because the musculature of each type of organism is adapted to provide for its special needs, comparisons of the muscles of pigs and humans may not be precise.
As you continue your dissection of various systems of the fetal pig, many anatomical similarities will be observed. These fundamental similarities are homologous structures. Although homologous structures have a similar structure and embryological origin, the functions are sometimes different.
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This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.