Fetal Pig Dissection

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Fetal Pig Dissection
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• The fetal pig our group is working on was not
  killed for this. It was found in a sow marked for
  slaughter, and was never born. It was then given
  to us for use in science.
• Sus scrofa is the technical name of the domestic
  pig. They eat both plants and animals. Their body
  temperature is slightly higher than humans. They
  live 15 to 20 years. Pigs are often used in
  experiments on human drugs. There is a new
  mini-pig that weighs 100-150 lbs. especially
  for that use.
• During gestation, there is an exchange of
  substances between the blood of te mother and of
  the embryo across the placenta through the
  umbilical cord.

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Our pig is 34 cm long, and was 112-115 days old
at birth, which is full term.
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Ventral (inferior)
Posterior (caudal)
Anterior (cranial)
Anatomical Directions
Lateral
Median
Transverse
Sagittal
Frontal (coronal)
Distal
Dorsal (superior)
Proximal
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Lumbar region
Mammilary papillae
tail
ankle
Umbilical cord
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Our fetal pig is male.
How many pairs of mammary papillae do you
count? 7 ½ pairs
Do all specimens in class have the same amount? No
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Pig Toes
Only the 2nd, 3rd, and 4th digits touch the
ground. The 1st is nonexistent and the 5th never
touches it.
2nd/3rd Digits
4th Digit
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Pig Dissection Notes

• Use scalpel sparingly
• Rely primarily on your dissecting needles.
• Leave organs intact unless directed to do
  otherwise.
• When using scissors, walk w/the blunt end out.
• Move organs aside w/your fingers or a blunt
  probe.
• Apply lanolin or Vaseline at the outset or wear
  thin rubber gloves.
• Line your dissection pan w/paper towels in order
  to absorb excess fluids, as a storage for
  structures removed, and to ease cleaning up at
  the end.
• Wrap the fetal pig in wet paper towels before
  returning it to the bag.
• Twist the top of the bag and close tightly w/a
  rubber band.
• Apply the following solution w/a one inch paint
  brush at the close of each session to preserve
  the softness and texture of the pig 30 grams of
  Carbolic Acid crystals, 250 ml. of Glycerin, and
  1000ml of Water.

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Salivary Glands
Masseter Muscle
Parotid Gland
Facial Nerve, Dorsal Branch
Facial Nerve, Ventral Branch
Submaxillary Gland
External Maxillary Vein
Stensens (Parotid) Duct.
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Teeth
3/3 Incisors
1/1 Canines
4/4 Premolars
0/0 Molars
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Nostril
Oral Cavity
Hard Palate
Soft Palate
Epiglottis
Opening to Naso-Parynx
Corner of Mouth (cut surface)
Tongue
Papillae of Tongue
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Canine Tooth
Hard Palate
Corner of mouth
Soft Palate
Opening to Naso-Pharynx
Opening to Trachea
Mandible
Epiglottis
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Stomach
Liver
L. I.
S. I.
Umbilical Artery
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L.I.
Liver
Umbilical Artery
S.I.
Urinary Bladder
Kidney, Spleen, Ceacum, and Stomach not shown
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Stomach
Pancreas
L.I.
Liver
S. I.