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. Mid-line thoracic cut.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. Pulling back the abdominal flap.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. Female genital papilla, urogenital opening, anus Figure 3. Female: injection site, nipples, umbilical cord. The word “urogenital” refers to an opening that serves both the urinary (excretory) and the reproductive systems. Use your pig and also a pig of the opposite sex to identify the structures in the photographs below. Use the photographs below to identify its sex. Obtain a fetal pig and identify the structures listed in the first photograph. The pig in the first photograph below has its ventral side up. The pig in the first photograph below is laying on its dorsal side. If a structure is anterior to another then it is closer to the head. The following words will be used to help identify the location of structures. Your pig may or may not have that injection. Some of the images have a pig that has been injected with a substance to show arterial flow in red and venous flow in blue. As a result, a structure shown in one photograph may look different than the same structure shown in another photograph. Several different pig dissections were used to obtain the photographs below.
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