Abstract
Beginning in the esophagus and continuing all the way to the anus, the wall of the digestive tube has the same basic arrangement of four layers. The four basic layers present are, from the lumen of the gut outward: the mucosa, the submucosa, the muscularis and the serosa. The mucosa is the mucous membrane that lines the digestive tract. It consists of three layers: an epithelial layer, the lamina propria, the muscularis mucosa. The submucosa contains blood vessels, lymphatics, nerves, and in some regions glands. The microcirculation of the alimentary tract is crucial not only for the nutritive maintenance of the alimentary tract itself, but also for its vital functions of secretion and absorption, since the circulation is the ultimate source of the secreted digestive juices and the recipient of absorbed digesta. Moreover, the integrity of mucosal barrier function is thought to play an important role in defending the host from translocation of intact micro-organisms or their breakdown products and toxins [1].
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Vallet, B., Nevière, R., Chagnon, J.L. (1996). Gastrointestinal Mucosal Ischemia. In: Rombeau, J.L., Takala, J. (eds) Gut Dysfunction in Critical Illness. Update in Intensive Care and Emergency Medicine, vol 26. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-80224-9_16
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DOI: https://doi.org/10.1007/978-3-642-80224-9_16
Publisher Name: Springer, Berlin, Heidelberg
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