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Your Digestive System & How it Works

On this page:

  • What is the digestive system?
  • Why is digestion important?
  • 中国石化长炼打开欧洲涂料原料市场
  • 家具业多名高管离职 橱柜企业打响转型之战
  • 麦肯锡将于3月宣布当选者,预计此人将对麦肯锡的发展方向产生重大影响。一些内部人士倾向于那些在快速增长领域(比如数据分析)具备专长的候选人,而其他人想要一位可以维护公司品牌的传统主义者。
  • 陶瓷行业内忧外患 薄利多销寻出路
  • 如果遇到奇葩租客 业主能够做些什么
  • Clinical Trials

What is the digestive system?

The digestive system is made up of the gastrointestinal tract—also called the GI tract or digestive tract—and the liver, pancreas, and gallbladder. The GI tract is a series of hollow organs joined in a long, twisting tube from the mouth to the anus. The hollow organs that make up the GI tract are the mouth, esophagus, stomach, small intestine, large intestine, and anus. The liver, pancreas, and gallbladder are the solid organs of the digestive system.

The small intestine has three parts. The first part is called the duodenum. The jejunum is in the middle and the ileum is at the end. The large intestine includes the appendix, cecum, colon, and rectum. The appendix is a finger-shaped pouch attached to the cecum. The cecum is the first part of the large intestine. The colon is next. The rectum is the end of the large intestine.

Human model showing the digestive system, which includes the mouth, salivary glands, esophagus, stomach, liver, gallbladder, pancreas, large and small intestines, appendix, rectum, and anus.
The digestive system

Bacteria in your GI tract, also called gut flora or microbiome, help with digestion. Parts of your nervous and circulatory systems also help. Working together, nerves, hormones, bacteria, blood, and the organs of your digestive system digest the foods and liquids you eat or drink each day.

Why is digestion important?

Digestion is important because your body needs nutrients from food and drink to work properly and stay healthy. Proteins, fats, carbohydrates, vitamins, minerals, and water are nutrients. Your digestive system breaks nutrients into parts small enough for your body to absorb and use for energy, growth, and cell repair.

  • Proteins break into amino acids
  • 为买房假离婚?万能的“假离婚”与尴尬的现实
  • Carbohydrates break into simple sugars

Duh..

Girl eating a tomato with yellow peppers, broccoli, carrots, and pasta. Photo also shows a glass of water.
Your digestive system breaks nutrients into parts that are small enough for your body to absorb.

How does my digestive system work?

Each part of your digestive system helps to move food and liquid through your GI tract, break food and liquid into smaller parts, or both. Once foods are broken into small enough parts, your body can absorb and move the nutrients to where they are needed. Your large intestine absorbs water, and the waste products of digestion become stool. Nerves and hormones help control the digestive process.

The digestive process

Organ Movement Digestive Juices Added Food Particles Broken Down
Mouth Chewing Saliva Starches, a type of carbohydrate
Esophagus Peristalsis None None
Stomach Upper muscle in stomach relaxes to let food enter, and lower muscle mixes food with digestive juice Stomach acid and digestive enzymes Proteins
Small intestine Peristalsis Small intestine digestive juice Starches, proteins, and carbohydrates
Pancreas None Pancreatic juice Carbohydrates, fats, and proteins
Liver None Bile Fats
Large intestine Peristalsis None Bacteria in the large intestine can also break down food.

How does food move through my GI tract?

The latest government figures were a big jump from data in mid-December, when1,200 people were said to have left or are seeking to leave to battle alongside jihadists.
Rounding out the top-performing sectors of 2014 was an unlikely pair: tech (+16%) and consumer staples (+13.2%)—the most aggressive and most defensive areas of the market, running side-by-side toward the finish line, with confounded spectators struggling to concoct a narrative for this. Why would the least cyclical sectors—healthcare, staples and utilities—lead the markets in a year in which unemployment plummeted and GDP growth gained momentum? Much to the chagrin of the pundit class, sometimes there are no satisfying answers. To quote Kurt Vonnegut:
不过无需置疑,软件的收购同时意味着“人才的收购”,雅虎买下的不只是产品,还有产品背后的人。达洛伊西奥如今已是雅虎伦敦分部的全职员工,而他的青春活力以及无可厚非的独特潜质给这个曾经腐朽老旧的科技巨头注入了迫切需要的新鲜活力。雅虎CEO玛丽莎?梅耶尔赞赏他“力求设计的完美和产品的简约”,并称自己“被他的创造活力和坚韧精神所感染”。
This year they looked at the use of negative strategies such as anger or stonewalling responses to conflict, and found that these predicted health-related changes over time in specific ways.
2011年,在《老友记》最后一季播出7年之后,美国卫星电视频道Comedy Central再次播放该剧,观看人数超过了3600万,而观众的年龄主要分布在16岁至34岁之间。假期时,看剧人数更是由于播放集数增加而飙升。
No Bad Manners Awards could be complete without a mention of a Kardashian, could it?

Photo of woman eating a strawberry.
The digestive process starts when you put food in your mouth.

Mouth. Food starts to move through your GI tract when you eat. When you swallow, your tongue pushes the food into your throat. A small flap of tissue, called the epiglottis, folds over your windpipe to prevent choking and the food passes into your esophagus.

Esophagus. Once you begin swallowing, the process becomes automatic. Your brain signals the muscles of the esophagus and peristalsis begins.

Lower esophageal sphincter. When food reaches the end of your esophagus, a ringlike muscle—called the lower esophageal sphincter —relaxes and lets food pass into your stomach. This sphincter usually stays closed to keep what’s in your stomach from flowing back into your esophagus.

Stomach. After food enters your stomach, the stomach muscles mix the food and liquid with digestive juices. The stomach slowly empties its contents, called chyme, into your small intestine.

Small intestine. The muscles of the small intestine mix food with digestive juices from the pancreas, liver, and intestine, and push the mixture forward for further digestion. The walls of the small intestine absorb water and the digested nutrients into your bloodstream. As peristalsis continues, the waste products of the digestive process move into the large intestine.

Large intestine. Waste products from the digestive process include undigested parts of food, fluid, and older cells from the lining of your GI tract. The large intestine absorbs water and changes the waste from liquid into stool. Peristalsis helps move the stool into your rectum.

Rectum. The lower end of your large intestine, the rectum, stores stool until it pushes stool out of your anus during a bowel movement.

Watch this video to see how food moves through your GI tract.

How does my digestive system break food into small parts my body can use?

TERRIBLE TIMEKEEPING

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  • digestive juices, such as stomach acid, bile, and enzymes

Mouth. The digestive process starts in your mouth when you chew. Your salivary glands make saliva, a digestive juice, which moistens food so it moves more easily through your esophagus into your stomach. Saliva also has an enzyme that begins to break down starches in your food.

Esophagus. After you swallow, peristalsis pushes the food down your esophagus into your stomach.

Stomach. Glands in your stomach lining make stomach acid and enzymes that break down food. Muscles of your stomach mix the food with these digestive juices.

Pancreas. Your pancreas makes a digestive juice that has enzymes that break down carbohydrates, fats, and proteins. The pancreas delivers the digestive juice to the small intestine through small tubes called ducts.

Liver. Your liver makes a digestive juice called bile that helps digest fats and some vitamins. Bile ducts carry bile from your liver to your gallbladder for storage, or to the small intestine for use.

Gallbladder. Your gallbladder stores bile between meals. When you eat, your gallbladder squeezes bile through the bile ducts into your small intestine.

Small intestine. Your small intestine makes digestive juice, which mixes with bile and pancreatic juice to complete the breakdown of proteins, carbohydrates, and fats. Bacteria in your small intestine make some of the enzymes you need to digest carbohydrates. Your small intestine moves water from your bloodstream into your GI tract to help break down food. Your small intestine also absorbs water with other nutrients.

Large intestine. In your large intestine, more water moves from your GI tract into your bloodstream. Bacteria in your large intestine help break down remaining nutrients and make vitamin K. Waste products of digestion, including parts of food that are still too large, become stool.

What happens to the digested food?

The Magic have bounced between average and bad, and they're currently on a downswing. Now Aaron Gordon and Nikola Vucevic are coming off the bench and Mario Hezonja is buried.
荷兰合作银行是面向全球农户和农业企业的领先融资机构。
Beijing has responded with increasing rancour against Seoul’s decision to deploy Thaad, the Terminal High Altitude Area Defence platform. While South Korea insists the system is for defending itself against North Korean missiles, China fears the technology will allow an ally of the US to spy on its military developments.
Feng said that the Goal for 2017 is to maintain an overall punctuality rate of about 75%.
10.自拍杆
当你在工作的时候,你的效率应该是很高的。不然的话,那就是在浪费你自己的时间和公司的财富。如果你很厌倦,一天当中大多数时间是在浏览网页,你可能是想要寻找其他的能够激励你的工作机会了。
Lei Jun, founder and chairman of Chinese smartphone giant Xiaomi Corp, agreed, describing the win as a breakthrough in artificial intelligence.

The lymph system, a network of vessels that carry white blood cells and a fluid called lymph throughout your body to fight infection, absorbs fatty acids and vitamins.

而今年的诺贝尔奖,更是一反过往青睐大型科技成果的传统,将大奖颁给了体积最小的科学新发现。
SETTING: This house is in Kenwood, a neighborhood of 19th- and 20th-century Tudors, Mediterraneans, Victorians and colonial-style houses between Cedar Lake and Lake of the Isles, in the city’s Chain of Lakes. Roads are curving; sidewalks are lined with maple and ash trees. According to the listing agent, many of the neighborhood’s older houses have been restored, while houses built within the last 30 years have been torn down and replaced.

How does my body control the digestive process?

最后,在EMBA榜单上,若剔除与非欧洲商学院的合办课程,瑞士洛桑国际管理发展学院(IMD)的毕业生的平均薪资为26.1397万美元,远远领先于排名第二的萨伊德商学院和排名第三的西班牙企业商学院。
“What we are seeing right now from China is not only a phenomenon for Brazil, we are seeing the same all over Latin America, declining [Chinese export] volumes into all the markets,” said Antonio Dominguez, managing director for Maersk Line in Brazil, Paraguay, Uruguay and Argentina. “It has been going on for several quarters but is getting more evident as we move into the year [2016].”

Hormones

AT&T和时代华纳(Time Warner)会在不作出大的妥协(比如出售美国有线新闻网(CNN))的情况下完成合并吗?
Bedrooms are up a curving staircase. A loft-like library overlooks the central atrium. Walls of glass in the master suite and its en-suite bathroom take in acres of marshland. The suite opens to a sun deck on the water side of the house. Both other bedrooms also have en-suite bathrooms. The lower level is finished as a gym, with a half bath and a garage with space for several cars.
To Anita Eerland and Rolf Zwaan [THE NETHERLANDS] and Tulio Guadalupe [PERU, RUSSIA, and THE NETHERLANDS] for their study "Leaning to the Left Makes the Eiffel Tower Seem Smaller."
Promote steady development of agriculture and continued increases in rural incomes
你感到抓狂是对的。公司无时无刻不在监视着你。无论你做什么都有记录:你打的每个电话,发的每条短信,每条在推特上发的帖子和讯息。在大部分公司,这些记录可永远不会删除(这吓人的吧,真可怕~)

Nerves

从化石燃料转向可再生能源,无疑是我们这个时代最重要的工程挑战和科学挑战。
但英国法庭可能会沉重打击优步叫车应用。2017年,总部位于加州的该公司未能让上诉法官相信,其两名伦敦司机是独立的合同工。2018年,这个判例案件将会打到上诉法院,而且还可能打到最高法院。如果优步败诉,被要求承担起雇主的责任,那将会产生深远的影响。
“尽管大多数中国品牌在国外还不为人知,但在国内,它们打下了很深的基础,”胡润百富董事长兼首席调研员胡润说。
从什么时候起,冬季成了一年中电视节目最丰富的季节?今年秋天有许多首播电视剧做了有组织的盛大宣传,获得不少关注,但更多有趣的剧集还是在一年中的前三个月中登陆有线台、无线台和网络。

“今年榜单有趣的地方之一是,尽管网站都开始实行更严的密码设定政策,位数少的密码仍出现在今年的榜单上。”
We'll start our review with the South American nations, and who else could we begin with, but the hosts Brazil. Rewind 18 months and they looked like they'd be struggling, but the appointment of 'Big Phil' Scolari has been inspired, and he's brought a belief to the team that was previously missing. Last years 3:0 demolition of Spain in the Confederations Cup final shocked many experts, and all of a sudden the Brazilians have expectations on them. Whilst you can't argue with that scoreline, we still wonder if Brazil have the firepower to win such a long tournament. Neymar is expected to conjure up the magic, but they're relying on Fred to come up with the goals. No disrepect to Fred, but the last two Brazilian teams to win the World Cup, in 2002 and 1994, could count on the likes of Ronaldo and Romario to lead the front line, two genuine legends of the game.
Granted, it is easier to remake something than to make something new. Anyone who has faced a blank page knows that. But if fashion’s ubiquitous default to the 1960s over the last seven years has exposed anything, it is its own lack of imagination, not only about clothes and consumers, but about the relationship of culture and dress.
他回忆称:“我曾认为教书不是一个合适的职业选择。我的老师告诉我,如果我想当一名老师,就得有很强的忍耐力,不能轻易感到厌倦。”
After Peking University, known as Bei Da, and Tsinghua University, the next highest-placed Chinese university is the University of Science and Technology of China at 15, Fudan University at 16, Shanghai Jiao Tong University at 18 and Zhejiang University at 19 in the top 20.
During the RoboCup 2500 contestants from 40 countries competed in 15 competitions with various types of computerized soccer robots, healthcare robots, rescue robots and dance robots.

Clinical Trials

10、 因为与邦德在一起很有趣,女人往往会迷上他,这在人际关系中很重要,也是很多首次约会一拍即合的秘诀。甚至派去杀他的女特工也会爱上他。研究证明,这也不奇怪,007的形象常被批成大男子主义,也许不错--但是,只能让他在女人面前的魅力有增无减。
安娜的工资也就是巴西的最低月薪,仅330美元。因此门票对普通老百姓来说实在过于昂贵。
Some 18.1 million people, for example, want a good full-time job but can't find one, an unusually high number 5 1/2 years into a recovery. And despite a sharp decline in the number of people out of work six months or longer, that figure is still higher than at any time before the 2007-09 recession.

What are clinical trials, and are they right for you?

201012/119869.shtml重点单词

What clinical trials are open?

Clinical trials that are currently open and are recruiting can be viewed at www.ClinicalTrials.gov.

December 2017
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This content is provided as a service of the In 2008, China's government added an entry to the list of conditions classified as mental illnesses: "Internet addiction." According to numerous reports in state-run media, China's young people were spending too much time in Internet cafes, ignoring family or work to play online games into the wee hours, sometimes neglecting to eat, drink, or sleep, and endangering their own health. (NIDDK), part of the National Institutes of Health. The NIDDK translates and disseminates research findings to increase knowledge and understanding about health and disease among patients, health professionals, and the public. Content produced by the NIDDK is carefully reviewed by NIDDK scientists and other experts.