Fetal Pig Number 12 Dissection

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Fetal Pig Number 12 Dissection
Josh Hansen, Anna Lucido, and Cosima Smith
Fetal Pig
ID Marker
February 17, 2005 Period 4
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Summary
The fetal pig dissected within this project is
unborn. While processing a sow for meat, this
fetal pig was taken out of her uterine horn and
given to science.
Order Artiodactyla Species Sus scrofa
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Age of Fetal Pig
Our groups pig measured 36 cm and 5 mm. This
leads us to believe the pig is around 112-115
days old.
Measuring String
Meter Stick
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External Features
Head
Neck
Trunk
Tail
Thoracic
Lumbar
Sacral
Cranial
Cervical
Caudal
Outer Ear
Tail
Eye
Knee
Ankle
Nose
Wrist
Tongue
Umbilical Cord
Umbilical Artery
Digit
Umbilical Vein
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Anatomical Terminology
Dorsal/Superior
Caudal/Posterior
Cranial/Anterior
Ventral/Inferior
Proximal
Distal
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Frontal Plane
Sagittal
Transverse Plane
Median
Lateral
Medial
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Sex of Fetal Pig
From identifying the urogenital papilla, we have
determined that our fetal pig is a female.
Tail
Mammary Papillae
Urogenital Papilla
Ankle
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Skeleton of the Fetal Pig
The first two frontal digits on the foot touch
the ground.
First Two Frontal Digits
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General Dissection Hints

• Check photos in manuals
• Confirm names and locations
• Greater caution must be used for fetal animals
  than adult animals
• Protect your hands with thin rubber gloves
• Make sure your specimen stays moist

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Salivary Glands
Facial Nerve, Dorsal Branch
Masseter Muscle
Parotid Gland
Facial Nerve, Ventral Branch
Submaxillary Gland
Stensens (Parotid) Duct
External Maxillary Vein
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Teeth
Needle teeth are used by infant piglets to secure
a hold onto their mothers nipple. During the
fierce competition for milk among siblings, the
needle teeth ensure a piglet a spot for feeding.
Top Jaw 3 Incisors 1 Canines 4 Premolar 0
Molar Bottom Jaw 3 Incisors 1 Canines 4
Premolar 0 Molar
Canine
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Oral Cavity
Nostril
Canine Tooth
Hard Palate
Soft Palate
Opening to Naso-Pharynx
Epiglottis
Mandible (cut surface)
Corner of Mouth
Tongue
Papillae of Tongue
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Oral Cavity Oblique View
Canine Tooth
Opening to Naso-Pharynx
Corner of Mouth
Hard Palate
Soft Palate
Opening to Trachea
Opening to Esophagus
Epiglottis
Mandible (cut surface)
Tongue
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Abdominal Cavity
Liver
Diaphragm
Stomach
Large Intestine
Small Intestine
Urinary Bladder
Umbilical Artery
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Visceral Organs
Liver
Stomach
Caecum
Spleen
Small Intestine
Kidney
Large Intestine
Umbilical Artery
Urinary Bladder
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Abdominal Cavity Close-up
(Picture taken from pig dissection book)
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Alimentary Canal
Small Intestine
Large Intestine
Stomach
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Human Digestive System
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Page 56 Questions 1-9

• Divisions of the pharynx nasopharynx,
  oropharynx, and the Laryngopharynx/Hypopharynx
• Seven passageways that penetrate the pharynx
  right eustachian tube, left eustachian tube,
  internal nares, external nares(nostrils), isthmus
  of fauces, and the eyes.
• Four different type of papillae on tongue and
  their differences sweet, sour, bitter, salty.
  These four types of papillae pick up the specific
  molecule that coincides with their own taste.
• Bones that comprise the hard palate the
  horizontal portions of the two palatine bones and
  the palatine portions of the maxillae
• Tonsils other than palatine lingual tonsils and
  adenoids
• Secretion of salivary glands begins the
  digestion (c) starches
• The esophagus is located (c) dorsal to the
  trachea
• Major blood vessel formed posterior to the
  submaxillary gland jugular vein
• Cap of cartilage that prevents food from entering
  the trachea during swallowing epiglottis

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Page 66 Questions 1-9

• Five lobes of the liver right lateral, right
  central, left central, left lateral, caudate lobe
• Description of the greater and lesser omentum
  structures of double-layered sheets that are
  filled with prominent patches of fat, which give
  them a lace-like appearance. The lesser omentum
  stretches from the lesser curvature of the
  stomach and extends to the liver. The greater
  omentum stretches from the greater curvature of
  the stomach and covers the intestines.
• The difference between the jejunum and ileum the
  jejunum is the second section of the small
  intestine, while the ileum is the final section
  of the small intestine.
• Location and function of the ileocecal valve
  located between the small and large intestine.
  Its function is to allow digested food to move
  from the small intestine into the large
  intestine.
• Parts of the alimentary canal in order mouth,
  esophagus, cardiac sphincter, stomach, pyloric
  sphincter, small intestine, ileocecal valve,
  large intestine, rectum, anus.
• The difference of location of the adrenal gland
  in pig and man in the fetal pig, the adrenal
  glands are found near the aorta, towards the
  cephalic end of the kidneys. In humans, the gland
  is found on top of the kidneys.

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7. Digestion of fats begins in the (c) small
intestine 8. The three major tubular structures
that pass through the diaphragm esophagus,
aorta, and the posterior vena cava. 9. Not found
in the abdominal cavity (c) trachea