Air and food pass through the oropharynx, a space in the posterior portion of the mouth. When breathing, air passes through the nasal passages to the nasopharynx. The hard palate and soft palate separate the nasal and oral cavities. The epiglottis projects up into a region called the pharynx. Open the jaw wide enough so that the glottis and epiglottis are exposed. You will need to cut through the musculature and the joint that holds the lower jaw to the skull.
Use a scalpel to cut the sides of the mouth so that the bottom jaw can be opened for easier viewing (see the photograph below). These two cuts will enable you to spread open the abdominal cavity. Figure 13.9.Ī cut is made on the side of the animal from the point just posterior to the diaphragm dorsally. Cut completely through the body wall in the abdominal area but keep the cut shallow in the neck region. Figure 13.8.Įxtend a single cut along the midline of the ventral surface of the animal to about 2 cm from the chin. The flap of body wall that contains the navel can be folded posteriorly to reveal the internal organs of the abdomen. Your finished cut will be anterior to the navel and along each side of the navel. Continue cutting from the anterior end of this cut so that it resembles an upside-down U. Insert one blade of scissors through the body wall on one side of the umbilical cord and cut posteriorly to the base of the leg as shown in the first photograph below. Tie one front leg of the animal with a string that passes underneath the dissecting pan to the other leg.
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