The Digestive System
消化系统作文600字左右
消化系统作文600字左右英文回答：The digestive system is a complex system in our body that helps us break down food and absorb nutrients. It consists of several organs, including the mouth, esophagus, stomach, small intestine, large intestine, and anus.The process of digestion begins in the mouth, where food is broken down into smaller pieces by chewing and mixed with saliva. Then, the food travels down the esophagus and into the stomach. In the stomach, gastric juices break down the food further and turn it into a semi-liquid substance called chyme.Next, the chyme enters the small intestine, where most of the digestion and absorption of nutrients takes place. The small intestine is lined with tiny finger-like projections called villi, which increase the surface area for nutrient absorption. The nutrients are then absorbedinto the bloodstream and transported to the cells in our body.After the small intestine, the remaining waste material enters the large intestine. Here, water is absorbed from the waste, making it more solid. The large intestine also houses millions of bacteria that help break down any remaining undigested food and produce certain vitamins.Finally, the waste material is eliminated from the body through the anus in the form of feces.The digestive system is essential for our survival as it provides us with the energy and nutrients needed for growth and repair. Without a properly functioning digestive system, we would not be able to extract the necessary nutrients from food, leading to malnutrition and various health problems.中文回答：消化系统是我们身体中一个复杂的系统，帮助我们分解食物并吸收营养。
医学专业英语 lesson 5 Passage 1 The Digestive System
Functions
Absorption 吸收
The passage of these nutrients from the gastrointestinal tract into the bloodstream
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Functions
Elimination 排泄 The excretion of solid waste materials that cannot be absorbed into the blood
❖ In the upper part of abdominal cavity
❖Connects the esophagus with the small intestine
fundus antrum
body
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The small intestine
Nearly all of the chemical digestion of the nutritional components of food takes place here. It is divided into three sections --- the duodenum,
Parotid gland
Sublingual gland
Submandibular gland
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The pharynx
nasopharynx oropharynx
laryngopharynx
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The pharynx
Functions
As a passageway
for food from the mouth to
Teeth Tongue Palate
Chewing Swallowing Speaking
digestive system 相关英语词汇
digestive system 相关英语词汇The digestive system is a complex network of organs and tissues responsible for breaking down food into nutrients that the body can absorb and use. It involves a series of physical and chemical processes that occur in the mouth, esophagus, stomach, small intestine, large intestine, and accessory organs such as the liver, pancreas, and gallbladder.Here are some key English vocabulary related to the digestive system:$$1. Mouth and Teeth:$$* **Mouth:** The entry point for food intake. * **Teeth (Teeth):** Hard, calcified structures used for chewing and grinding food. * **Tongue:** A muscular organ that moves food around in the mouth and helps in swallowing. ***Saliva:** A watery secretion that moistens food, begins the chemical breakdown of carbohydrates, and helps in swallowing.**2. Esophagus:*** **Esophagus:** A muscular tube that carries food from the mouth to the stomach. * **Peristalsis:** The rhythmic muscular contractions that propel food through the esophagus.**3. Stomach:*** **Stomach:** A hollow, muscular organ that stores food, secretes gastric juices, and mixes food with these juices to form a semisolid mass called chyme. * **Gastric Juice:** A mixture of hydrochloric acid, enzymes, and mucus secreted by the stomach. * **Hydrochloric Acid:** A strong acid that helps in the digestion of protein and creates an acidic environment that kills bacteria. * **Enzyme:** A biological catalyst that speeds up chemical reactions in the body, including the breakdown of food into nutrients. * **Mucus:** A slippery, viscous substance that coats the lining of the stomach, protecting it from the corrosive effects of gastric juice.**4. Small Intestine:*** **Small Intestine:** A long, coiled tube that continues from the stomach and is the primary site of digestion and absorption of nutrients. * **Duodenum:** Thefirst part of the small intestine, closest to the stomach. * **Jejunum:** The middle part of the small intestine. ***Ileum:** The final part of the small intestine, leading to the large intestine. * **Villi:** Tiny, finger-like projections on the inner lining of the small intestine that increase its surface area for absorption. * **Microvilli:** Minute projections on the surface of the villi that further enhance the absorption capacity of the small intestine.**5. Large Intestine:*** **Large Intestine:** A wider, shorter tube that absorbs water and forms feces. * **Colon:** The major part of the large intestine. * **Rectum:** The final, straight section of the large intestine, leading to the anus. ***Feces:** Solid waste product formed in the largeintestine and expelled from the body through the anus.**6. Accessory Organs:*** **Liver:** A large organ that produces bile, metabolizes fats, stores vitamins and minerals, and detoxifies the blood. * **Bile:** A yellowish fluid produced by the liver and stored in the gallbladder. It helps in the digestion of fats. * **Gallbladder:** A small,pear-shaped sac that stores bile until it is needed for digestion. * **Pancreas:** A gland that produces enzymes that break down carbohydrates, fats, and proteins, as well as hormones that regulate blood sugar levels.**7. Digestive Processes and Functions:*** **Digestion:** The process of breaking down food into smaller molecules that can be absorbed by the body. ***Absorption:** The process of nutrients passing through the walls of the small intestine into the bloodstream. ***Metabolism:** The set of chemical reactions that occur in the body to convert food into energy and building blocksfor cells and tissues.These are just a few of the many terms related to the digestive system. The digestive system is a highly complex and interconnected network of organs and processes, and its efficient functioning is crucial for maintaining overall health and well-being. Disorders of the digestive system can lead to a range of symptoms and health issues, makingit important to maintain a healthy diet and lifestyle to promote optimal digestive health.。
介绍消化系统英语作文
介绍消化系统英语作文Hey there! Today, I want to introduce you to the digestive system. It's like a really cool factory inside our bodies that helps us turn the food we eat into energy and nutrients.So, what's in the digestive system? Well, there's the mouth, where we chew our food and start the digestion process. And then there's the esophagus, which is like a tube that carries the food from the mouth to the stomach.In the stomach, there are special acids and enzymes that break down the food even more. It's like a big blender, turning the food into a soupy mixture called chyme.From the stomach, the chyme goes to the small intestine, where all the important nutrients are absorbed into our bloodstream. And the leftover stuff goes to the large intestine, where water is absorbed and the waste is turned into poop.Finally, the poop is stored in the rectum until it's time to go to the bathroom. It's like a final stop before the food leaves our bodies.So, that's the digestive system in a nutshell! Pretty amazing, huh? It's always working hard to keep us healthy and fueled. So, let's give a big "thank you" to our digestive system!。
Digestive system
Mouth
Mouth,or oral cavity or buccal cavity, is where digestive system starts and where food enters the gastrointestinal tract. The labia(Lips) protect its outer opening, bucca(cheeks) from lateral walls, hard palate and soft palate respectively form the anterior and posterior portion of the roof. The tongue and its muscles extend across the floor of the mouth by frenulum. On the surface of the tongue are some papillae called taste buds, capable of perceiving various flavors in the foods, such as bitterness, sweetness, saltiness and sourness.
Digestive System
The digestive system also called the gastrointestinal(GI) system, has two function: 1.Preparing the food for useby hundreds of millions of body cells 2.Eliminating unusable wastes from the body.Biblioteka Small Intestine
Thedigestivesystem_86715
Name__________________________________ period _____date assigned_____________ date due ______________ date returned ___________The Digestive SystemMatch the following vocabulary words to their definition.Please write a capital letter in the blank.1. mechanical digestion A. a muscular bag that crushed foodand contains acids and enzymes forbreaking down food.2. chemical digestion B. removal of waste material left overafter food is digested to preventillness.3. absorption C. muscular tube where most of thechemical digestion takes place andmost nutrients are absorbed.4. elimination D. food is physically broken down intosmaller pieces by breaking,crushing and mashing.5. villi E. small finger-like projections thatline the inside of the small intestineand absorb nutrients6. salivary glands F. gland that produces enzymes thathelp to break down food chemically.7. stomach G. process by which nutrient moleculespass through the wall of yourdigestive system into your blood.8. small intestine H. chemicals (enzymes)produced bythe body break foods into theirsmaller nutrients.9. large intestine I. muscular tube where vitamins Band K are made and water isremoved from food waste.11 Which cell organelles performsimilar functions inside the cellthat the digestive system doesfor our body?F mitochondriaG lysosomeH cell membraneJ all of the above 12 Which organ is responsible formost of the chemical digestion inthe human body?A mouthB stomachC small intestineD large intestine10 The diagram below shows two important parts of the human digestivesystem.Which of these statements is correct?A The majority of mechanical digestion takes place in part B.B The pancreas releases enzymes into part A to aid in chemicaldigestion.C As food digests, it moves through part B first, then through part A.D The inside of part A is covered with finger-like projections called villi.13What two body systems arerepresented in this diagram? F respiratory and reproductiveG muscular and skeletalH digestive and respiratoryJ circulatory and endocrine14What is the primary function ofthe villi in the small intestine? A to help blood flow into theveinsB to increase nutrientabsorptionC to decrease water absorptionD to help produce vitamin A15Birds have a gizzard that is filledwith small stones. When a bird swallows, the food is broken up as it passes back and forth between the chemicals in the stomach and the gizzard.The gizzard has a similar function to which part of the digestive system? F stomachG teethH small intestineJ villi16 Use the diagram above. In whichorgan does almost all absorptiontake place?A liverB pancreasC small intestineD gall bladder 18 When a person’s body needsfood, the brain helps maintainhomeostasis by sending signalsthat make the personA feel hungry.B perspire.C put on a sweater.D feel tired.19 Mechanical digestion begins withthe -F salivary glandsG teethH epiglottisJ esophagus17 Use the diagram above. In theprocess of digestion, where dochemical changes begin?F mouthG esophagusH stomachJ small intestines20 To show students that gravity alone is not the only force that helps movefood through the body, the teacher does a headstand and eats a cookie.Which of the following is MOST responsible for moving the food to theteacher’s stomach while upside down?A chewing by teethB movement of the tongueC squeezing by the esophagusD contraction of the stomach21 Which of the following phrases describe the function of the digestivesystem?I. Smooth, muscular tube connects the mouth to the stomach.II. Muscular action in the esophagus pushes food to the stomach.III. Structures called villi absorb nutrients from foodIV. To supply n utrients to the body’s cells.F I and IIG II and IIIH II and IVJ IV22 Each organ of the digestive system plays an important role in fooddigestion. What is one role of the liver?A The liver is responsible for most mechanical digestion that occurs.B The liver produces bile, which helps to break down fats.C The liver transports food through the digestive tract usingperistalsis.D The liver absorbs water from digested material before it moves tothe rectum.25Which function is performedprimarily by the digestive system? F exchange of gases betweenthe blood and the environmentG removing wastes from thebodyH breakdown of largemolecules into smaller onesJ transport of nutrients to cells23When your body needs additional energy, like when you run, things happenin your body systems to give you the additional food and oxygen you needin your cells. Which of the following is happening to send more energy to cells when you are running?I. Your skeletal system gets stronger.II. Your digestive system breaks down food faster. III. Your heart pumps blood with more force. IV. Your lungs work harder and faster.F II and IVG III and IVH I and IIIJ II, III and IV24Which term describes the type ofdigestion that results from chewing and crushing food into smaller pieces? A absorptionB peristalsisC chemical digestionD mechanical digestion。
消化系统 英文版
The stomach is divided into the fundic, cardiac, body, and pyloric regions. The stomach has three layers of muscle: an outer longitudinal layer, a middle circular layer, and an inner oblique layer. The inner lining consists of four layers: the serosa, the muscularis, the submucosa, and the mucosa. The mucosa is densely packed with gastric glands, which contain cells that produce digestive enzymes, hydrochloric acid, and mucus. The stomach is a multi-functional organ, it stores food, breaks it down and then empties it into the small intestine.
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The small intestine consists of three sections. duodenum, jejunum and ileum which attaches to the first portion of the large intestine.
Function digestion, and absorption . The small intestine finishes the process of digestion, absorbs the nutrients, and passes the residue on to the large intestine. The liver, gallbladder, and pancreas are accessory organs of the digestive system that are closely associated with the small intestine.
2.The Digestive System
• • • •
pancreato(pancreas) stomato(mouth) linguo(tongue) duodeno(duodenum)
• pancreato(pancreas): pancreatopathy,pancreatitis
• stomato(mouth):stomatitis,stomatoplasty(口腔成形 术),stomatalgia • linguo(tongue):sublingual,linguodental,lingualoplasty • duodeno(duodenum):duodenectomy,gastroduodena l,duodenoscopy
• He started to have the pain on July 10,2004,soon after his supper. The pain was persistent in nature, gradually increased in severity and radiated to the right scapular region. He vomited once. No fever was noticed. He had similar attacks in the past.
• The mouth: • 1. decomposes very large aggregates of food molecules into smaller particles • 2.allows saliva and enzymes to enter inside the larger food complexes • 3. set off a signaling message to the body to start the entire digestive process
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The Human Digestive System
Begins when food enters
the mouth. It is physically broken down by the teeth. It is begun to be chemically broken down by amylase, an enzyme in saliva that breaks down carbohydrates.
The Human Digestive System
1.
Duodenum Bile, produced in the liver but stored in the gall bladder, enters through the bile duct. It breaks down fats. The pancreas secretes pancreatic juice to reduce the acidity of the chyme.
The Human Digestive System
The bolus passes down
the esophagus by peristalsis. Peristalsis is a wave of muscular contractions that push the bolus down towards the stomach.
The Human Digestive System
3. Ileum
The last portion of the small intestine is the ileum, which has fewer villi and basically compacts the leftovers to pass through the caecum into the large intestine.
The Human Digestive System
The large intestine (or
colon) is used to absorb water from the waste material leftover and to produce vitamin K and some B vitamins using the helpful bacteria that live here.
The Human Digestive System
2. Jejunum
The jejunum is where the majority of absorption takes place. It has tiny fingerlike projections called villi lining it, which increase the surface area for absorbing nutrients.
The Human Digestive System
All leftover waste is
compacted and stored at the end of the large intestine called the rectum. When full, the anal sphincter loosens and the waste, called feces, passes out of the body through the anus.
Introduction
There are four stages to
food processing: 1. Ingestion: taking in food 2. Digestion: breaking down food into nutrients 3. Absorption: taking in nutrients by cells 4. Egestion: removing any leftover wastes
The Human Digestive System
To enter the stomach,
the bolus must pass through the lower esophageal sphincter, a tight muscle that keeps stomach acid out of the esophagus.
The Human Digestive System
The stomach does do
some absorption too. Some medicines (i.e. aspirin), water and alcohol are all absorbed through the stomach. The digested bolus is now called chyme and it leaves the stomach by passing through the pyloric sphincter.
The Human Digestive System
Chyme is now in the
small intestine. The majority of absorption occurs here. The liver and pancreas help the small intestine to maximize absorption. The small intestine is broken down into three parts:
The Hormone Gastrin
Digestion and Homeostasis
A large meal activates
receptors that churn the stomach and empty it faster. If the meal was high in fat, digestion is slowed, allowing time for the fat to be broken down. Hence why we feel fuller after eating a high fat meal.
The Human Digestive System
The stomach has folds
called rugae and is a big muscular pouch which churns the bolus (Physical Digestion) and mixes it with gastric juice, a mixture of stomach acid, mucus and enzymes.
The Human Digestive System
The acid kills off any
invading bacteria or viruses. The enzymes help break down proteins and lipids. Chemical Digestion. The mucus protects the lining of the stomach from being eaten away by the acid.
The Human Digestive System
The tongue moves the
food around until it forms a ball called a bolus. The bolus is passed to the pharynx (throat) and the epiglottis makes sure the bolus passes into the esophagus and not down the windpipe!
The Human Digestive System
Each villi itself has tiny fingerlike projections called microvilli, which further increase the surface area for absorption.
Digestion and Homeostasis
The en and circulatory systems all work together to control digestion. Before we eat, smelling food releases saliva in our mouths and gastrin in our stomachs which prepares the body for a snack.
Introduction
The digestive system is
used for breaking down food into nutrients which then pass into the circulatory system and are taken to where they are needed in the body.