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Message definition (Gastrointestinal tract ) ====Histology==== {{Main|Gastrointestinal wall}} [[File:Layers of the GI Tract numbers.svg|thumb|300px|General structure of the gut wall {{unbulleted list |'''1:''' ''Mucosa:'' Epithelium |'''2:''' ''Mucosa:'' Lamina propria |'''3:''' ''Mucosa:'' Muscularis mucosae |'''4:''' Lumen |'''5:''' Lymphatic tissue |'''6:''' Duct of gland outside tract |'''7:''' Gland in mucosa |'''8:''' ''Submucosa'' |'''9:''' Glands in submucosa |'''10:''' Meissner's submucosal plexus |'''11:''' Vein |'''12:''' ''Muscularis:'' Circular muscle |'''13:''' ''Muscularis:'' Longitudinal muscle |'''14:''' ''Serosa:'' Areolar connective tissue |'''15:''' ''Serosa:'' Epithelium |'''16:''' Auerbach's myenteric plexus |'''17:''' Nerve |'''18:''' Artery |'''19:''' Mesentery }}]] The gastrointestinal tract has a form of general histology with some differences that reflect the specialization in functional anatomy. The GI tract can be divided into four concentric layers in the following order: * [[Mucous membrane|Mucosa]] * [[Submucosa]] * [[Muscular layer]] * [[Adventitia]] or [[Serous membrane|serosa]]
Histology
General structure of the gut wall 1: Mucosa: Epithelium2: Mucosa: Lamina propria3: Mucosa: Muscularis mucosae4: Lumen5: Lymphatic tissue6: Duct of gland outside tract7: Gland in mucosa8: Submucosa 9: Glands in submucosa10: Meissner's submucosal plexus11: Vein12: Muscularis: Circular muscle13: Muscularis: Longitudinal muscle14: Serosa: Areolar connective tissue15: Serosa: Epithelium16: Auerbach's myenteric plexus17: Nerve18: Artery19: Mesentery
The gastrointestinal tract has a form of general histology with some differences that reflect the specialization in functional anatomy. The GI tract can be divided into four concentric layers in the following order: