The small intestine has three parts: the duodenum, the jejunum, and the ileum.

小肠分为三个部分，分别为十二指肠、空肠与回肠。

The final portion is called the terminal ileum, and it absorbs vitamin B12 and bile salts which are recycled.

最后一部分为末端回肠，可以吸收维生素B12盐（进行盐循环）。

(3) The last section, the ileum is attached to the large intestine.

（3）最后一部分的回肠与大肠相连。

There are a ton of tiny lymph nodes sprinkled throughout the intestines called Peyer's patches, and they're particularly common in the ileum.

肠腔中散布着大量微小淋巴，称为Peyer集合淋巴，以回肠最为多见。

Unlike the jejunum, the ileum is also capable of undergoing structural and functional adaptations to compensate for the jejunum if needed.

与空肠不同，回肠可进行构功能上的适应性改变，在代偿空肠功能。

And finally at the end, running into the large intestine is the ileum, where important vitamins like A, B12, E, D, and K are absorbed.

最后，进入大肠的是回肠，重的维生素 A、B12、E、D K 在回肠中被吸收。

The third section is called the ileum, and it has tight intercellular junctions, allowing it to efficiently absorb fluid and begin concentrating the intestinal contents.

第三部分为回肠，有紧密的细胞间链接，使得回肠可以高效地吸收液体，浓缩肠内容物。

Occasionally, the diverticulum can invert and stick back into the intestine, allowing it to serve as a lead point that again drags the ileum into the cecum.

憩室偶尔会翻入肠腔内，成为肠套叠的起点，把回肠拽入盲肠。

This happens in the small intestine's lower regions, the jejunum and ileum, which are coated in millions of tiny projections called villi.

这发生在小肠的下部区域，即空肠回肠，它们被数百万个称为绒毛的微小突起覆盖。

Extending from the end of the ileum to the anus, it is divided into four parts: cecum, colon, sigmoid colon and rectum.

大肠从回肠末端延伸到肛门，并分为四个部分：盲肠，肠，乙状肠直肠。

As more gastrointestinal tissue is damaged, patients might experience pain in the affected areas, most commonly in the right lower quadrant which is associated with the ileum.

随着胃肠道组织损伤的加重，患者可能会在受损区域感到疼痛，最常见于右下腹，是回肠的体表投射部位。