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**They are modified sebaceous glands.
 
**They are modified sebaceous glands.
   −
===Pig===
+
===[[Hindgut Fermenters - Anatomy & Physiology - Horse|Equine]]==
 +
 
 +
===Porcine===
 
*Also have '''anal sacs'''.
 
*Also have '''anal sacs'''.
  
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