Among vertebrates it appears only in a small number of marsupials and primates.  The goblet cells th
Among vertebrates it appears only in a small number of marsupials and primates.  The goblet cells that line it secrete an antibacterial mucus to control organismal growth in the surrounding region.  Other than in rudimentary versions this structure of the alimentary canal is absent in all invertebrates.  It is seemingly vestigial, but it can possibly affect the health of the adjacent cecum [SEE-kum].  Attached to the ileum, FTP, name this organ preceded by the adjective "vermiform," and which can inflame and burst in humans.
Among vertebrates it appears only in a small number of marsupials and primates.  
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