In Biology we have started our Fetal Pig Dissection. I have created a blog to go through the day by day steps that we will be covering in class including pictures of what we did that day, what system we are looking at, and how those different systems function. Pigs are mammals like us and we share basic body forms.
This is a picture of our fetal pig it has no incisions. Fetal pigs use to be preserved in formaldehyde but research shows that formaldehyde can cause cancer so now most fetal pigs are preserved in alcohol. Fetal pigs are unborn and come from a sow that has been butchered and the butchers were not aware the sow was pregnant which makes them an ideal and common specimen for Biology 12 dissection.
Day 1:
Day 1 was for sexing our pig and making the initial cuts so we could open it up to see all the organs. You can determine the sex of your pig by looking for the urogenital opening. The Urogenital opening is the exit point for both urine (uro) and egg/sperm (genital). Females urogenital opening is near the anus which is located under the tail and on males the urogenital opening is located by the umbilical cord.
SEXING THE PIG
As you can see our fetal pig was a female. This picture shows you where the urogenital opening is and it's location which is under the anus. Once we have figured out the sex of our pig it was then time to make the initial incisions and take a look at the organs that can be found inside.
INITIAL INCISIONS
This was how we were shown how to make the initial incisions with the scalpel. You want to be really careful you don't cut to deep because that could result in harming the organs.
Once the pig was all cut open we got to play a little detective work and look around for some organs. In the picture above you can see the Liver, Large Intestine, Small Intestine, Umbilical Cord, and the Spleen. The Liver is one of the bodies vital organs and has many different functions like detoxification, protein synthesis, and producing biochemicals for digestions. The Large Intestine is attached to the Small Intestine and the Rectum its purpose is to absorb water from food that were indigestible and then pass waste from the body. Small Intestine is attached to the bottom of the Stomach and to the Large Intestine this is where most of digestion and nutrients are absorbed. The Umbilical Cord connects the fetus to the placenta and is how the fetus gets its needed nutrients and how it releases its wastes. The Spleen deals with Red Blood Cells and the Immune system, removes old red blood cells and recycles Iron. The anterior end of the pig would be located at the bottom of the picture above and the posterior end is located at the top of the picture that is above.
Work Cited.
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