双语字幕 Mesentery: organ and functions 肠系膜：器官和功能 Did you know that your small intestine is approximately five meters in length? That’s nearly as tall as an adult male giraffe or two and a half times the size of your average basketball player. So, how is it that the not-so-small small intestine fits into our abdominal cavity? 大家知道小肠有近 5 m 长吗？这个长度几乎逼近成年雄性长颈鹿的高度，或者是篮球运动员平均身高的 2.5 倍！那么，如此“不小”的小肠是如何适应狭窄的腹腔环境的呢？ Well, that’s what we’re going to find out today in our tutorial about the mesentery. Before we begin, I’d like to give you a quick overview of what we’re going to talk about in this tutorial. 这就是今天的肠系膜教程将要讲解的内容。开始讲解前，我先快速介绍一下我们将在这个教程中讨论的内容。 In our image here, which is going to feature throughout this tutorial, we can see inside the abdominal cavity. The greater omentum has been reflected upwards and the small intestine has been removed, so that we can see the star of the show – the mesentery.在我们的图片（贯穿教程始终）中，我们可以看到腹腔内部。大网膜向上反折，小肠已做切除，因此我们可以看到这节课要介绍的结构---肠系膜。 We’ll start off our tutorial by discussing what the mesentery actually is then we’ll move on to talk about some relations of the mesentery and wrap up our tutorial with some clinical notes.在这节课中，我们将先讨论肠系膜到底是什么，然后我们将继续探讨肠系膜相关的一些要点，最后，我们将学习一些临床相关问题。 So what is this structure that we’re learning about and what is it for? Before we start talking about the mesentery, I’m first going to introduce you to the peritoneum. 那么，我们将要学习的这个结构是什么，它有什么功能呢？在开始讨论肠系膜之前，我先向大家介绍一下腹膜。 Here, we can see the abdominal cavity in the sagittal plane. I’ve chosen this image because it nicely shows how the peritoneum lines the walls of the abdominal cavity and most of the organs or the viscera contained within it. 在这儿，我们可以看到腹腔的矢状面。之所以选择这张图，是因为它完美地展示了腹膜在腹腔壁上的排列方式，以及腹膜内包裹的大多数器官或内脏。 The peritoneum is a double layer of serous membrane or mesothelium and can be divided into two parts: the parietal peritoneum and the visceral peritoneum. The parietal peritoneum which we can now see highlighted in green lines the walls of the abdominal cavity, whereas the visceral peritoneum covers most of the abdominal viscera. 腹膜是一种双层浆膜或间皮，可分为两部分：壁腹膜和脏腹膜。壁腹膜（如图中的绿色区域所示）贴附于腹腔壁上，而脏腹膜则覆盖大多数腹腔内的内脏。 The peritoneum can form folds such as mesenteries, omenta and ligaments. Okay, so now that we’re familiar with the peritoneum, let’s move on to talk about some of its folds. 腹膜可以形成褶皱，如肠系膜、网膜和韧带。现在，我们已经了解了腹膜，接下来我们继续讨论腹膜的一些褶皱。 The mesenteries are peritoneal folds that contain viscera and anchor them to the posterior abdominal wall. The largest mesentery is the mesentery proper or the mesentery of the small intestine. It is a fan-shaped double layer of peritoneum that connects the jejunum and the ileum to the posterior abdominal wall. 肠系膜是容纳内脏，并将内脏固定在腹后壁的腹膜襞。最大的肠系膜是固有肠系膜或小肠系膜。它是将空肠和回肠固定于腹后壁的扇形双层腹膜。 Superiorly, the mesentery of the small intestine is attached at the junction between the duodenum and the jejunum. It then travels obliquely downwards to terminate at the ileocecal junction. 在上面，小肠系膜连接在十二指肠与空肠交界处。然后，它向下斜行，止于回盲部。 The two peritoneal layers of mesentery proper contain the blood vessels, nerves, and lymphatics that supply the jejunum and the ileum. The mesentery proper isn’t the only mesentery of the human body. We actually have a few more.固有肠系膜的两个腹膜层包含供应空肠和回肠的血管、神经和淋巴管。固有肠系膜并非人体唯一的肠系膜，实际上，我们也有其他的一些肠系膜。 Next stop, we have the transverse mesocolon, which we can now see highlighted in green. 接下来，我们看横结肠系膜，如绿色突出显示部分所示。 The transverse mesocolon anchors the transverse colon of the large intestines to the posterior abdominal wall. It leaves the posterior abdominal wall from the anterior surface of the pancreas and travels outwards to enclose the transverse colon. 横结肠系膜将大肠的横结肠固定在腹后壁。它自胰腺前表面游离于腹后壁，向外行，包围横结肠。 相关单词学习
Mesentery
①发音和释义 mes•en•ter•y/ˈmɛsəntərɪ/n. 肠系膜The membrane, consisting of a double layer of peritoneum, that invests the intestines, attaching them to the posterior wall of the abdomen. 单词 mesentery由下列成分构成 mes-（前缀）中间的+entérion 肠(图源：太帅图库)
《医学英语：从入门到精通》（课时：408） 这门课共408个课时，囊括8000医学词汇，课程质量与图书《Medical Terminology: An Illustrated Guide 》相当，但视频中精美的动画比书本更有助于快速记忆，帮助临床医生、医学生以及医学科研工作者摆脱医学英语看不懂、听不懂和医学单词记不住的困境。Learn from yesterday, live for today, and hope for tomorrow. 借鉴昨天，活在今天，憧憬明天。戳“阅读原文”，查看全部视频课程
