Dissection of a Pregnant Pig Uterus

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Dissection of a PregnantPig Uterus

• By
• Michael Hanss

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Preparation

• Supplies
• Pregnant pig uterus
• Scalpel/ razor blade
• Gloves
• Safety glasses
• Lab Coat
• Ruler

• Set-Up
• Lay out the uterus on a cutting surface covered
  in paper towels.
• Place the uterus so it is the shape of a Y
• Feel around the uteruss surface for where the
  fetuses are located.

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• Each fetus should make a bulge in the Uterine
  wall.
• In the center of the Y shape is the cervix.

Cervix
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Fallopian Tubes
Fallopian Tubes

• The Fallopian tubes can be found on the outside
  of the uterus.
• They tubes look like long thin stretches of skin.

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First Incision

• Make an incision directly above where the lump of
  the fetus is.
• Pull back the Uterus along the cut to reveal the
  fetus in the placental membrane.
• There will be a lot of fluid spilling out, so
  have paper towels ready to clean it up with.

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Removal of Fetus

• You should be able to simply pull the fetus out
  of the incision.
• Make a cut towards the end of the placental
  membrane to free the fetus.

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Revealing the Fetus

• Begin to make a cut into the placental membrane,
  and peel the membrane off the fetus.
• Be careful not to cut the umbilical cord, because
  that is interesting to observe.

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Repeat the previous steps until all the fetuses
are removed.

• Use the ruler to measure the lengths of the
  Fetuses. Use the lengths and general appearances
  to judge the differences in development of the
  litter.

Average Development Rate of the Fetal Pig
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Study of the Uterus.

• It can be seen that the muscle tissue on the
  inside of the placenta is smooth.
• This means that it is involuntary, which would
  be understandable during child birth.

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Fallopian Tubes

• It can be seen that the Fallopian tube enters the
  uterus from the outside and goes in.
• This is how the embryo gets implanted into the
  uterus.

Tube
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