Repeat this procedure with the hind limbs to hold the legs apart so you can examine internal structures. Run the string under the tray, pull it tight, and tie it to the other front limb. Tie a string securely around a front limb.Place the fetal pig ventral side up in the dissecting tray.Obtain your dissecting equipment and pig from the supply cart. Be sure to wear your lab apron and eye cover.Return your lab equipment and pig to the supply cart and then thoroughly wash your hands with soap. Obtain a piece of masking tape and label your bag with your names. Wrap the pig in damp paper towels and put it in a zip-lock plastic bag. Clean up your materials and work area.Label the drawing of the inside of the pig’s mouth.Pigs are omnivores, eating plants and animals. Canine teeth are longer for tearing food, while incisor are shorter and used for biting. Examine the tongue and note tiny projections called sensory papillae. Dorsal to the glottis, find the opening to the esophagus.This cavity carries air from the nostrils to the trachea, a large tube in the thoracic which supplies air to the lungs. Above the epiglottis, find the round opening of the nasopharynx. Locate the epiglottis, a cone-shaped structure at the back of the mouth.The anterior part of the palate is the hard palate, while the posterior part is the soft palate. Observe the palate on the roof of the mouth.Spread the jaws open and examine the tongue.Your incision should extend posteriorly through the jaw. With scissors, make a 3-cm incision in each corner of the pig’s mouth.Carefully lay the pig on one side in your dissecting pan and cut away the skin from the side of the face and upper neck to expose the masseter muscle that works the jaw, lymph nodes, and salivary glands. In the female, the opening is ventral to the anus. In the male, the opening is on the ventral surface of the pig just posterior to the umbilical cord.
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