We also talked about how epithelial cells are polar, having both apical and basal sides, and are selectively permeable, and lastly we took a brief look at how our glandular epithelial tissue forms both out endocrine and exocrine glands.

我们还讨论了上皮细胞是如何极性的，具有基底两侧，并且具有选择性渗透性，最后我们简要了了我们的上皮组织如何形成内分泌外分泌。

Finally, at the lower esophageal sphincter, the squamous epithelium joins the columnar gastric epithelium to form the gastroesophageal junction.

最后，在食管下括约肌处，食管鳞状上皮移行为胃柱状上皮，形成了胃-食管交界区。

And then there is the glandular epithelium, which forms glands and secretes hormones and other substances.

然后是上皮，形成体并分泌激素其他物质。

Unlike the cells that go on to form, say, your epithelium, which are fixed and neatly arranged in sheets, mesenchymal cells can be situated any-which-way, and can move from place to place.

与形成上皮细胞的细胞不同，间充质细胞可以位于任何方向，并且可以从一个地方移动到另一个地方。