Pig Dissection

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Pig Dissection
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Fetal Pig Dissection Resources

• http//www.biologycorner.com/pig/fetal.html
• http//www.whitman.edu/biology/vpd/main.html
• http//faculty.clintoncc.suny.edu/faculty/Michael.
  Gregory/files/Bio20102/Bio2010220Laboratory/Fet
  al20Pig/Fetal20Pig.htm

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Part One External anatomy

• Label your diagram of the pig with the following
  landmarks
• Cranial
• Pectoral
• Pelvic
• Caudal
• Describe
• these regions
• on you dissection sheet

pectoral
pelvic
cranial
Ear Pinna
eye
External nares
caudal
hooves
2 arteries
Umbilical cord
1 vein
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Part One External anatomy

• Label your diagram of the pig with the following
  directional terms
• dorsal
• ventral
• anterior
• posterior
• Describe these regions on you dissection sheet

Dorsal
Anterior
Posterior
Ventral
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Part One External anatomy

• Label your diagram of the pig with the following
  directional terms
• medial
• lateral
• proximal
• distal
• Describe these
• terms on your
• dissection sheet

medial
medial
lateral
lateral
distal
proximal
proximal
distal
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Part One External anatomy

• Sexing your pig
• Both sexes
• Nipples
• Umbilical cord

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Part One External anatomy

• Sexing your pig
• female
• Urogenital Papilla,
• Anus

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Part One External anatomy

• Sexing your pig
• male
• Urogenital Opening,
• Penis,
• Scrotal sacs
• Anus
• Umbilical cord

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Part two Mouth

• Locate these structures
• Paired nares
• Tongue
• Papillae
• Unerupted teeth

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Part two Mouth
Paired nares

• Locate these structures
• Hard palate
• Soft palate
• Pharynx
• Epiglottis

Hard palate
Soft palate
Nasal cavity
epiglottis
pharynx
tongue
Unerupted teeth
papillae
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Part two Mouth

• Cut a hole in the roof of the mouth to expose the
  nasal cavity.

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Measuring length in cm

• Measure the length of your pig from tip of snout
  to base (near anus) of tail.
• Use the following chart to determine age.
• The gestation time for pigs is 112 days

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Part three Abdominal structures

• Make cuts 2,3,4 and 5 to open the abdominal
  cavity.

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Digestive organs
Liver
Stomach
Gall Bladder
Spleen
Pancreas
Large Intestine
Small Intestine
Mesentery
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Digestive system

• Abdominal Area
• Peritoneum
• Liver
• Gall bladder
• Stomach
• Small Intestine

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Digestive system

• Abdominal Area
• Esophagus
• Pyloric sphincter
• Pancreas
• Large intestine
• Rectum

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Digestive system

• Abdominal Area
• Rugae (inside stomach)
• Mesentery
• Villi (inside intestine)

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Part four Respiratory system

• Open the chest cavity by making incisions
• 1 and 7.

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Part four Respiratory system

• Respiratory structures
• Trachea
• Bronchi
• Lungs
• Intercostal muscles
• Ribcage
• diaphragm

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Part five Circulatory

• Locate these heart structures
• Right auricle
• Right ventricle
• Left auricle
• Left ventricle
• Coronary artery

Right auricle
Left auricle
Right ventricle
Left ventricle
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Part six Urinary (excretory)

• Open the caudal area by
• Making incision 6

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Urinary structures

• Locate the two
• KIDNEYS
• URETERS
• And one urinary bladder

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Urinary structures

• Cut open one kidney by slicing it from the
  lateral toward the medial surface
• Observe the medulla and cortex

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Part seven Genital system

• Female pig
• Ovary
• Uterine tubes
• Uterus
• Vagina

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Part Seven Genital system

• Male pig
• Testis
• Epididymus
• Ductus deferens
• Urethra
• Penis
• Scrotal sac

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Part eight Immune system

• Locate the
• spleen
• thymus