Kerckring's fold

Japanese: Kerckring's fold(英語表記)Kerckringsfold
Kerckring's fold

The opening of the accessory pancreatic duct is located about 2 cm above the major papilla, and is called the minor papilla or minor duodenal papilla. In the duodenal lumen below the second part, numerous annular folds (Kerckring's folds) consisting of the mucosa and submucosa are formed perpendicular to the longitudinal axis (Figure).
[structure]
The structure of the duodenal wall is made up of layers of mucosa, submucosa, muscularis propria, and subserosa, from the luminal side. The outermost layer is covered by the serosa (peritoneum) on the anterior side (the abdominal cavity side) and continues to the retroperitoneum on the posterior side.

From the Small Intestine

...The internal diameter of the upper jejunum is 2 to 3 cm and the lower ileum is 1.5 to 2 cm.
[Structure of the small intestine wall]
The wall of the small intestine is composed of the mucosa, muscularis mucosa, submucosa, muscularis, and serosa, and there are numerous transverse folds, or Kerckring's folds, on the mucosal surface. The Kerckring's folds are tall and densely arranged in the jejunum, but are short and rather sparsely arranged in the ileum.

*Some of the terminology that mentions "Kerckring's fold" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…また副膵管の開口部が主乳頭の約2cm上方にみられ,これを副乳頭または小十二指腸乳頭という。第2部以下の十二指腸内腔には,長軸に直交する方向に,粘膜,粘膜下層からなる多数の輪状ひだ(ケルクリングひだKerckring’s fold)が形成されている(図)。
[構造]
 十二指腸壁の構造は,内腔側から順に,粘膜,粘膜下層,固有筋層,漿膜下層が層状に重なり,最外層は,前面(腹腔側)は漿膜(腹膜)におおわれ,後面は後腹膜に続いている。…

【小腸】より

…空腸の内径は上部で2~3cm,回腸下部で1.5~2cmである。
[小腸壁の構造]
 小腸の壁は粘膜,粘膜筋板,粘膜下層,筋層,漿膜からなっており,粘膜面には横走する多数の皺襞(しゆうへき),すなわちケルクリングひだKerckring’s fold(輪状ひだ)が存在する。ケルクリングひだは空腸では丈高く密に並ぶが,回腸では丈も低く,その配列もかなり粗となっている。…

※「Kerckring's fold」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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