Fetal Pig Dissection

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Fetal Pig Dissection

• The fetal pig is a mammal like us so it has many
  structures that are similar to ours.
• The anatomy class will analyze the structure and
  function of the external and internal parts of
  the fetal pig relating it to human structures.

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Lab 1-External structures

• In this lab, you will
• Locate external structures and state the
  functions of those structures.
• Locate the bones listed on the lab sheet by
  region.
• Answer general questions about the pig.

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Procedure

• You will be assigned a partner, a pan,
• and a dissection kit (It is your
• responsibility to clean and dry
• your kit and pan each day. Also,
• clean your table. It will be checked
• and points removed if it is not.)
• At the appointed time, you will pick up a pig
  from the bucket. You will place a safety pin with
  colored beads on the ear so that you can remember
  which pig is yours when it is returned to the
  bucket. Get the same pig each day.
• Make sure you stay at your assigned table until
  told to put your pig up. No horse play. This is a
  time for learning not just socializing.

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External Features Lab

• Using the lab manual you were given, answer the
  questions that are on your lab hand-out
• At the appointed time, locate the external
  structures and bones of the pig
• Tomorrow, you will be tested on the location of
  the structures as well as any information you
  were asked on the lab sheet.

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External pig parts
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Both sexes have

• Nipples and umbilical cord

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Distinguishing between sexes

• Female-urogenital
• pappila by anus
• Male urogenital opening is by
  umbilical cord
• Also, may see scrotum sacs

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Looking at the mouth

• Cut jaws like illustrated

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Epiglottis, glottis and soft palate

• Locate epiglottis (1) and soft palate (2)
• Glottis is
• 2 and epiglottis is 1

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Palates and nasal opening

• Hard palate (1) Soft palate (2) Internal nares
  (3)

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Nictating Membrane

• In corner of eye/3rd eyelid

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Bones of fetal pig

• 1. Locate major
• bones listed on
• lab sheet
• 2. State function(s)
• of each bone.

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Muscle groups

• Remove the skin (very carefully) from your pig
• Locate the muscles circled in lab booklet.

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Internal pig structures

• Cut the pig as
• illustrated
• Do not go deep
• Around the
• Umbilical cord
• Open it up and pin
• it down to the
• pan

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Internal structures

• Your pig dissection should look like the pictures
  
• (remember to cut gently around the umbilical
  cord-do not cut the vessels connected to it)
• Locate structures
• and write the
• function of the
• structures on
• your hand-out (picture on the next slide)

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Picture of internal structures
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Urinary system

• Locate kidneys, ureter, bladder, colon

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Male reproductive system

• Locate
• epididymis
• penis
• testes
• scrotum

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Female reproductive system

• Locate
• fallopian tubes (2)
• ovaries (1)
• bladder (6)
• horn of uterus (3)

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Fetal pig brain

• Cut as illustrated in this picture
• (remove top of Skull very carefully)

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Measuring the intestines

• Remove intestines as a large mass (ball)
• Separate the intestines by getting the messentery
  that holds them together
• The pair with the longest intestines gets 25
  bonus points on a test and the bragging rights
  for the longest intestines (its a pride thing!)
• Must be finished by 825 (no later)