Pig Dissection Lab
Spring 2010
First Day
•
•
•
•
•
•
•
•
•
•
•
•
Fetal Pigs – Source, preservative
Umbilical cord, placenta
Demonstration of pregnant sow uterus
Safety – goggles, gloves, aprons, lab coats, jewelry
Feel “sick”
Lab Packets – Directions with questions
and Handouts (Colored pencils)
Dissection process and roles
Storage, “goodie bag” for organs; pan and lid
Clean up – table tops, air freshener, dissection
kits, aprons and lab coats
Study assistance – My PV webpage study links and notes link,
Google, Classroom and text charts, Text chapters, “Greasy Guy”;
Color plates – pig and heart
Assessment – Two quizzes; One major exam – lecture and practical
Pig Jokes
Pregnant Sow Uterus
Fetal Pig Gender Determination
• Urogenital orifice – opening
for both urine and
reproduction (semen in male)
(birth canal and receiving
the penis in female)
• Male – just inferior to umbilical
cord; thin, white penis just
under abdominal skin opens
into it; one orifice under tail =
anus; scrotal sac present
• Female – just inferior to anus;
two orifices under tail
urogenital papilla (clitoris)
Male vs. Female Excretory and
Reproductive Anatomy
Pig Dissection
•
•
•
•
•
•
First incision
Begin just inferior of the cervical region
Proceed medially and ventrally down the thoracic area.
Be superficial at first
Later, deepen the incision
At the umbilical region, proceed around the umbilicus in
a circular fashion.
• Don’t complete the most posterior part of the circle. May
sever the penis!!
• From the mid ventral incision, at the axillary regions,
proceed laterally
• From the mid ventral incision, make 2 sets of lateral cuts
in the upper and lower abdominal regions
Pig Dissection- Initial Cuts
“Hog Tying”
•
•
•
•
Use two pieces of string
Tie tightly to one forelimb and one leg
Wrap under the pan
Tie with an adjustable knot to the other forelimb
and leg
• Slip out from under pan at end of class
• “Hog Tie”
• Adjust as needed for tightness to open the body