FoundationPart of the Digestive
肠
Intestinum
一条折叠的消化通道，在此吸收养分，肠道菌群则支撑着全身健康。
Explore in 3D
In short
皱襞、绒毛与微绒毛把它的表面积成倍放大。
它的内壁每隔几天就更新一次，是全身更新最快的组织。
Key facts
- 大小
- 展开后约 6–7 米
- 重量
- 随内容物而变化
- 位置
- 腹部中段与下部
- 血液供应
- 肠系膜上、下动脉
- 功能
- 消化与养分吸收
- 每日
- 栖息着数以万亿计的微生物
- Tissue type
- 肠绒毛
- Latin term
- Intestinum
Structures to know
7 labelled structures
十二指肠
Duodenum
小肠的第一段
Open 十二指肠 in 3D空肠
Jejunum
主要吸收区域
Open 空肠 in 3D结肠
Colon
回收水分
Open 结肠 in 3DIleum
Ileum
Final absorption of nutrients
Open Ileum in 3DCaecum
Caecum
Where the large intestine begins
Open Caecum in 3DRectum
Rectum
Holds waste before it leaves
Open Rectum in 3DMesentery
Mesenterium
Suspends the gut and carries its vessels
Open Mesentery in 3D
Numbers at rest
Typical adult values — not a diagnostic reference.
Total length7.5 m
Usual range 6–9 m
Absorptive surface30 m²
Usual range 25–32 m²
Transit time30 h
Usual range 24–48 h
Resident microbes38 ×10¹²
Clinical relevance
皱襞、绒毛与微绒毛把它的表面积成倍放大。
- 肠易激综合征
- 炎症性肠病
- 乳糜泻
- 憩室炎
- 肠梗阻
- 结直肠息肉
- 克罗恩病
- 乳糖不耐受
Study material only — this is not medical advice or a diagnostic tool.
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Reviewed 2026-08-18 · Structure names follow Terminologia Anatomica (TA2).