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  2. Gastrointestinal wall - Wikipedia

    en.wikipedia.org/wiki/Gastrointestinal_wall

    The layers are not truly longitudinal or circular, rather the layers of muscle are helical with different pitches. The inner circular is helical with a steep pitch and the outer longitudinal is helical with a much shallower pitch. The coordinated contractions of these layers is called peristalsis and propels the food through the tract.

  3. Myenteric plexus - Wikipedia

    en.wikipedia.org/wiki/Myenteric_plexus

    A part of the enteric nervous system, the myenteric plexus exists between the longitudinal and circular layers of muscularis externa in the gastrointestinal tract. It is found in the muscles of the esophagus, stomach, and intestine. [citation needed] The ganglia have properties similar to the central nervous system (CNS). These properties ...

  4. Gastric folds - Wikipedia

    en.wikipedia.org/wiki/Gastric_folds

    The gastric folds consist of two layers: Mucosal layer – This layer releases stomach acid. It is the innermost layer of the stomach. [5] It is affected by the hormone histamine, which signals it to release hydrochloric acid (HCl). Sub-mucosal layer – This layer consists of different vessels and nerves, ganglion neurons, and adipose tissue ...

  5. Carnett's sign - Wikipedia

    en.wikipedia.org/wiki/Carnett's_sign

    In medicine, Carnett's sign is a finding on clinical examination in which abdominal pain remains unchanged or increases when the muscles of the abdominal wall are tensed. [1] [2] For this part of the abdominal examination, the patient can be asked to lift the head and shoulders from the examination table to tense the abdominal muscles.

  6. Stomach - Wikipedia

    en.wikipedia.org/wiki/Stomach

    The gastrointestinal wall of the human stomach Layers of the gastrointestinal wall of which the stomach is a dilated part. Like the other parts of the gastrointestinal wall, the human stomach wall from inner to outer, consists of a mucosa, submucosa, muscular layer, subserosa and serosa. [18]

  7. Gastrointestinal tract - Wikipedia

    en.wikipedia.org/wiki/Gastrointestinal_tract

    The muscularis externa of the stomach is composed of the inner oblique layer, middle circular layer, and the outer longitudinal layer. Between the circular and longitudinal muscle layers is the myenteric plexus. This controls peristalsis. Activity is initiated by the pacemaker cells, (myenteric interstitial cells of Cajal).

  8. Thoracolumbar fascia - Wikipedia

    en.wikipedia.org/wiki/Thoracolumbar_fascia

    The thoracolumbar fascia (lumbodorsal fascia or thoracodorsal fascia) is a complex, [1]: 1137 multilayer arrangement of fascial and aponeurotic layers forming a separation between the paraspinal muscles on one side, and the muscles of the posterior abdominal wall (quadratus lumborum, and psoas major [1]: 1137 ) on the other.

  9. Basal electrical rhythm - Wikipedia

    en.wikipedia.org/wiki/Basal_electrical_rhythm

    Smooth muscle within the GI tract causes the involuntary peristaltic motion that moves consumed food down the esophagus and towards the rectum. [1] The smooth muscle throughout most of the GI tract is divided into two layers: an outer longitudinal layer and an inner circular layer. [1] Both layers of muscle are located within the muscularis ...

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