Gastrointestinal tract/ja: Difference between revisions

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# [[Anal canal/ja|肛門管]]

~~<div lang~~=~~"en" dir="ltr" class="mw-content-ltr">~~

====発達====

===~~=Development~~====

腸は[[endoderm/ja内胚葉]]由来の構造である。ヒトの発生からおよそ16日目に、[[embryo/ja|胚]]は2つの方向に[[ventral/ja|腹側]]に折れ始める（胚の腹面が[[concave polygon/ja|凹]]になる）：胚の側面は互いに折り込まれ、頭部と尾部は互いに向かって折れ曲がる。その結果、胚の[[ventral/ja|腹側]]面に接している[[endoderm/ja|内胚葉]]に覆われた構造物である[[yolk sac/ja|卵黄嚢]]の一部が、原始的な腸になるためにつまみ出され始める。卵黄嚢は[[vitelline duct/ja|硝子管]]を介して腸管とつながったままである。通常、この構造は発生過程で退縮するが、退縮しない場合は[[Meckel's diverticulum/ja|メッケル憩室]]として知られる。

~~The gut is an~~ [[endoderm]]~~-derived structure. At approximately the sixteenth day of human development, the~~ [[embryo]] ~~begins to fold~~ [[ventral]]~~ly (with the embryo's ventral surface becoming~~ [[concave polygon|~~concave~~]]~~) in two directions: the sides of the embryo fold in on each other and the head and tail fold toward one another. The result is that a piece of the~~ [[~~yolk sac~~]]~~, an~~ [[endoderm]]~~-lined structure in contact with the~~ [[~~ventral~~]] ~~aspect of the embryo, begins to be pinched off to become the primitive gut. The yolk sac remains connected to the gut tube via the~~ [[vitelline duct]]~~. Usually, this structure regresses during development; in cases where it does not, it is known as~~ [[Meckel's diverticulum]].

~~</div>~~

@@ Line 54: / Line 54: @@
 # [[Anal canal/ja|肛門管]]
-<div lang="en" dir="ltr" class="mw-content-ltr">
+====発達====
-====Development====
+{{main/ja|Development of the digestive system/ja}}
-{{main|Development of the digestive system}}
+腸は[[endoderm/ja内胚葉]]由来の構造である。ヒトの発生からおよそ16日目に、[[embryo/ja|胚]]は2つの方向に[[ventral/ja|腹側]]に折れ始める（胚の腹面が[[concave polygon/ja|凹]]になる）：胚の側面は互いに折り込まれ、頭部と尾部は互いに向かって折れ曲がる。その結果、胚の[[ventral/ja|腹側]]面に接している[[endoderm/ja|内胚葉]]に覆われた構造物である[[yolk sac/ja|卵黄嚢]]の一部が、原始的な腸になるためにつまみ出され始める。卵黄嚢は[[vitelline duct/ja|硝子管]]を介して腸管とつながったままである。通常、この構造は発生過程で退縮するが、退縮しない場合は[[Meckel's diverticulum/ja|メッケル憩室]]として知られる。
-The gut is an [[endoderm]]-derived structure. At approximately the sixteenth day of human development, the [[embryo]] begins to fold [[ventral]]ly (with the embryo's ventral surface becoming [[concave polygon|concave]]) in two directions: the sides of the embryo fold in on each other and the head and tail fold toward one another. The result is that a piece of the [[yolk sac]], an [[endoderm]]-lined structure in contact with the [[ventral]] aspect of the embryo, begins to be pinched off to become the primitive gut. The yolk sac remains connected to the gut tube via the [[vitelline duct]]. Usually, this structure regresses during development; in cases where it does not, it is known as [[Meckel's diverticulum]].
-</div>
 <div lang="en" dir="ltr" class="mw-content-ltr">