The submucous coat is a layer of strong but loose areolar tissue with some elastic fibres, lying between the muscularis mucosae and the muscularis externa; it is rich in mast cells, macrophages, lymphocytes, eosinophilic leucocytes and plasma cells. It forms a bed in which the vessels and nerves break up before entering the mucous membrane; consequently it contains arteries, veins, lymphatics and Meissner’s nerve plexuses. The plexuses form part of the autonomic nervous system and contain postganglionic sympathetic fibres as well as pre- and postganglionic parasympathetic fibres. The nerve cells are all parasympathetic.


Vasoactive Intestinal Polypeptide Vasoactive Intestinal Polypeptide Pyloric Ring Pyloric Mucosa Loose Areolar Tissue 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1993

Authors and Affiliations

  • Albertus D. Keet
    • 1
  1. 1.Welgemoed BellvilleSouth Africa

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