Hunger drive is controlled by hypothalamus. Glucostatic thery of hunger suggests that an increase in blood glucose level increases the activity of the safety center and decreases the activity of hunger center. Low blood glucose has the opposite effects. Aminoacid levels and lipid levels have also been suggested to influence hunger and satiety. The hepotostatic theory of hunger control argues for a role of liver as an important sensor and modulator of the body energy stores. digestion
Showing posts with label digestive system. Show all posts
Showing posts with label digestive system. Show all posts
glucostatic
Digestive system in mammals
General anatomy of digestive system. Ozofagus 1/3 is striated muscle, 2/3 is smooth muscle. Small intestine: duodenum, jejenum, ileum. The end of ileum is appendix (secum in horse) in human. Large intestine: colon, rectum, anus. the structure of digestive tract. Muscularis mucosa, mucus layer, submucosa. Plexus myentericus. In the large intestine, longitiudial muscles concentrated circular muscle n large intestine produce haustra formation. The length of digestive tract depends on type of food ingested by animals. Longest in herbivours, shorter in carnivores.
What is the digestive system ?
The digestive system is a technological marvel of the human body. It helps us to chew digest, extract nutriments and get rid of that which we don’t need. In order to understand the digestive system it is important to know it various organs. The digestive system includes the digestive tract, a tube extending from the mouth to the anus, as well as a host of other organs.
The first area of the digestive system and where the journey of all our food begins is the mouth or oral cavity. The mouth includes the lips, cheeks, teeth and palate and it also contains the tongue. The salivary glands and tonsils complete the mouth area. is surrounded by the lips, cheeks, teeth, and palate, and it contains the tongue. The salivary glands and tonsils are accessory organs of the oral cavity.
The mouth opens into the pharynx which continues into the esophagus. The esophagus in its turn continues into the stomach. Within the stomach the walls of the stomach have an abundance of tube like glands. These are the glands that release all the stomach acid which in turn begins to digest all the food it has received. The stomach leads to the small intestine. The small intestine itself is comprised of many different structures including the duodenum, the liver, the gallbladder and the pancreas. by digestive system blog
The next segment of the small intestine is the jejunum. The jejunum has small glands along it which help it in its major task of absorption. Father the jejunum we reach the ileum, the last segment of the small intestine. After the ileum comes the larger intestine. The purposes of the larger intestine are to convert undigested food into feces. The segments of the large intestine include the cecum, the ascending, transverse, descending and sigmoid colons and finally the rectum
Digestive system and nutrients vitamins minerals
this is detailed animation and x-ray images—the major organs in the digestive process and examine how they work together to bring nutrients into the human body and convert them into forms that our cells can use. some of important things: the nutritional role of vitamins and minerals, lactose intolerance and the effects that crash dieting can have on the body's metabolic system.
digestive system mouth and stomach
digestive system video about mouth and stomach. Small and big intestine. Digestion system is very very important for all living forms.
Digestive System animation video
Digestive system video animation.. good explanations .. especially for students and childs. muscle system functions and learn more about it
some foods for burning fat
some foods can burn fat scientificly approved. Some foods high in vitamin C have fat burning properties. Research also suggests that foods high in calcium can breakdown fat. Some fat burning foods:
Citris fruits (i.e. limes, lemons, oranges, grapefruit, tangerines)
Apples, berries and other fresh fruit
Garlic - in particular garlic oil, or garlic juice
Eggs (high in protein and contain vitamin b12)
Low fat dairy products
Olive oil
Lean meat. Lean beef, turkey, chicken etc.
Fish. Salmon and tuna are a great source of protein.
digestive system summary
Starting at the mouth, the digestive system helps provide the energy your body needs to perform its many functions. Upon entry into a person's mouth, the teeth cut, tear, crush and grind food. In the mouth, salivary glands respond to the thought or presence of food by producing a fluid containing mucus and the enzymes amylase and maltase. The tongue then mixes the food and rolls it into a soft ball, called the bolus, which is pushed toward the esophagus. Passing through the esophagus the bolus is dropped into the stomach where gastric glands, one secreting digestive enzymes and the other secreting hydrochloric acid, begin to break the food down into smaller pieces. The stomach wall discharges mucus during this phase to protect itself against the action of the gastric acid. From there the food passes into the small intestine through the phylorus, a sphincter muscle that controls the flow of food. It is in the small intestine where a major part of digestion and absorption occurs. The intestinal wall releases enzymes which digest proteins, fats and carbohydrates. Blood and lymph vessels, which supply the small intestine, take away the final products of digestion. The lymphatics transport the fats around the body and finally release them into the bloodstream. Blood takes sugars and amino acids to the liver via the portal vein. The pancreas, like the small intestine, secretes enzymes in an alkaline juice to digest proteins, fats and carbohydrates. It also manufactures hormones which regulate the blood sugar level. From the small intestine, the digested food is received by the liver, which manufactures bile for the gall bladder. The gall bladder stores and discharges the bile, which helps to break down fats into minute droplets. Undigested food from the small intestine is then passed into the large intestine. There blood vessels supplying the large intestine carry away water extracted from the undigested waste. After passing through to the large intestine the ileocecal valve prevents digested food from returning to the small intestine. Undigested food is eliminated from the system through the anus.
digestive system and stomach
Distention of the stomach and small intestine stretching of the abdominal wall, the hormone cholecystokinin and the mechanical activity of chewing and swallowing all inhibit the hunger center.
Swallowing (deglutation) ; primer and seconder peristatic movements along the osophagus
Osophagal sphincter
Stomach; contraction is more stronger in antrum than fundus.
Cardiac and pyloric sphincter
Small intestine; peristalsis, segmentation and penduler contraction
Large intestine; segmentation, mass movement and antiperistalsis.
Anal sphincter; internal and external and defecation occur.
Vitamin absorbtion
Vitamins are very important helpers for human being survival . Vitamins are absorbed in small intestines. The two types of vitamins : first water-soluble vitamins (all the B vitamins and vitamin C) and second fat-soluble vitamins (vitamins A, D, E, and K).
Fat-soluble vitamins are stored in the liver and fatty tissue of the body. Water-soluble vitamins are not easily stored and excess amounts go away from body in urine.
Why is digestion important?
So you can ask why is digestion is very important. Let me explaing : when you eat some foods—such as bread, meat, fruits, pizza etc. The body cant use them as in this form. It must be suitable for body cells. Food and drink must be changed into smaller molecules of nutrients before they can be absorbed into the blood and carried to cells throughout the body. So this mean that we need digestion process. Digestion is the process by which food and drink are broken down into their smallest parts so the body can use them to build and nourish cells and to provide energy.
large intestine and functions
large intestine:
With a diameter or contour of between 7 and 10 centimeters, the large intestine is indeed thicker than the thin, and it is almost the last stop making food in the digestive tract. Like the small intestine is retreated about himself on the inside of your body, and, if it spreads completely, would measure about 1.5 meters long. The large intestine is a tube with a closed end that stands out and that is called the appendix. Although the appendix is part of the digestive tract, does not appear to play any role, but it can give problems because sometimes becomes infected and must be removed (ie, drawn by an operation).
As we have said, once it has removed most of the nutrients from the liquid mixture of food, is what is known as waste products, the material that I could not use your body and you have to be expelled to the outside. Can you guess where it ends? Well, here's a hint: to lose sight of, you have to pull the string.
Before being expelled, waste products pass through the portion of the large intestine called the colon, which is where the body is the last chance to absorb water and some minerals, discharges into the bloodstream. As the waste products are losing water, are tightening while moving the large intestine into a solid. Yes, it is the cacas (more finely called stool, stools or bowel movements).
The large intestine is pushing the stool until he arriving in the rectum, the last portion of the digestive tract. The products in solid waste remain here until you have wanted to go to the bathroom. When you go to the bathroom, you emerge from these expelling waste products through the anus. And now is when the chain comes into action!
Check a hand to your digestive system
You can help your digestive system by drinking water and taking a healthy diet containing foods rich in fiber. The fiber-rich foods such as fruit, vegetables and whole grains, helping to move stool through the digestive tract. The digestive system is a very important part of your body.
small intestine - another organ of digestion system
More than 6 meters of small intestine
The small intestine is a long tube with a diameter or contour between 3.5 and 5 centimeters, which retreated on himself inside yourself, below the stomach. If you extend your computer's small intestine, measured about 6.7 meters long - as 22 notebooks lined one after another!
The small intestine plays an important role in breaking down the mix of food from the stomach even more, so your body can absorb all the nutrients it contains vitamins, minerals, proteins, carbohydrates and fats. The roast chicken contains many proteins - and a little fat - and the small intestine will help you absorb them, as long as their friends - the pancreas, liver and gall bladder - you throw a hand.
The bodies just mentioned various juices to send the first portion of the small intestine. These juices help to digest food and allow the body to absorb the nutrients they contain. The pancreas produces some juices that help the body to digest fats and proteins. Which secretes a juice called bile, the liver helps to absorb fats in the bloodstream. And the gallbladder is like a store bile, which stores this juice to your body when you need it.
The foods you eat can stay for up to 4 hours in your small intestine until it becomes a liquid mixture and watery. It is a time well spent, because at the end of the trip, nutrients from the pizza, chicken, oranges and milk may move from the intestine into the blood. Once in the blood, your body will be much closer to harness the complex carbohydrates in the body of the pizza, the vitamin C of oranges, chicken protein and calcium from milk.
esophagus tube
The esophagus is an elastic tube, which measures about 25 centimeters long. Leads the food from the back of the throat to the stomach. But in the back of the throat is also the trachea, which allows air to enter and exit your body. When you swallow a ball of food and crushed or softened some liquid, a barb of a special fabric called epiglottis closes the opening in the trachea to ensure that the food enters the esophagus, rather than the trachea.
If you've ever drunk a little too fast, you've started coughing and someone said that the drink "you'll be gone by the other side", which meant that person is the liquid you had come into the trachea by mistake . This happens when the epiglottis does not give you time to close, and you'll be coughing involuntarily (without thinking about it) to clear the trachea.
The digestion begins in the mouth
The digestion begins in the mouth
Before that first mouthful of food at a palatable when you smell, what you see or think about him, starts digestion. You are starting to form saliva in the mouth. When you eat, saliva begins the process of decomposition of the chemicals they contain food and aid to soften to make it easier to swallow. The language helps push food through your mouth while you chew with the teeth. When you're ready to swallow, the tongue pushes a piece of food and crushed softened, called a food bolus, toward the back of the throat, to enter through the opening of the esophagus, the second part of the digestive tract.
your digestive system
Your digestive system began working even before they drive the tooth to the pizza. And will continue to busy digesting your food freshly chewed over the next few hours - or sometimes days, depending on what you've eaten. This process, called digestion, allows your body get the nutrients and energy it needs from your diet. Now let's find out what's happening with your pizza, your chicken, your orange and your milk.
Digestive System in Mammals
General anatomy of digestive system
Ozofagus;1/3 is striated muscle, 2/3 is smooth muscle.
Small intestine; duodenum, jejenum, ileum.
The end of ileum is appendix (Secum in horse) in human.
Large intestine; colon, rectum, anusThe structure of digestive tract
Muscularis mucosa
Mucus layer
Submucosa
Plexus myentericus
In the large intestine, longitiudinal muscles concentrated as longitiuidinal line called tenia coli.
Concentrated circular muscle in large intestine produce haustra formation.
The length of digestive tract depends on type of food ingested by animals.
Longest in herbivours, shorter in carnivoursIngesting of food
Hunger drive is controlled by hypothalamus
Glucostatic theory of hunger suggests that an increase in blood glucose level increases the activity of the satiety center and decreases the activity of hunger center.
Low blood glucose has the opposite effects.
Aminoacid levels and lipid levels have also been suggested to influence hunger and satiety.
The hepatostatic theory of hunger control argues for a role of liver as an important sensor and modulator of the body energy stores. Distension of the stomach and small intestine, stretching of the abdominal wall, the hormone cholecystokinin and the mechanical activity of chewing and swallowing all inhibit the hunger center.
Swallowing (deglutation); primer and seconder peristaltic movements along the osophagus
Osophagal sphincter
Stomach; Contraction is more stronger in antrum than fundus
Cardiac and pyloric sphincter
Small intestine; peristalsis, segmentation and penduler contractionLarge intestine;Segmentation, Mass movement and antiperistalsis.
Anal sphincter; internal and external.
Defecation.
LIVER
A. General Structure: The liver is the body's largest gland. It is partly covered by a thin capsule (Glisson's capsule) and has a sparse, delicate, reticular connective tissue stroma accompanying the blood vessels as they penetrate the parenchyma. Its predominant cell type is the hepatocyte. These cells are arranged in one- or 2-cell-thick plates that are separated by the hepatic sinusoids. The liver has a dual blood supply, the portal vein and the hepatic artery; it also has 3 drainage systems, the hepatic veins, lymphatic vessels, and bile ducts.
B. General Functions: The liver has several important functions, most of which are carried out by hepatocytes. Its main role in digestion involves the enzymatic processing (metabolism) of nutrients absorbed by the intestines to provide the body with the chemical building blocks and fuel needed to support life. Some hepatocyte enzymes aid in detoxification by modifying potentially dangerous chemicals and drugs and rendering them harmless. Hepatocytes synthesize many important proteins; albumin, prothrombin, fibrinogen, lipoproteins) and secrete them into the blood, thus acting as an endocrine gland. They also synthesize bile from the wastes of erythrocyte destruction and secrete it into the biliary tract, acting as an exocrine gland. The liver also serves as a storage site for glucose, fats, and vitamin A
nC. Blood Supply:
n1. Hepatic portal vein. 2. Hepatic artery. 3. Hepatic sinusoids. 4. Central veins. 5. Hepatic veins.
nD. Cell Types:
n1. Hepatocytes. 2. Kupffer's cells. Monocyte-derived members of the mononuclear phagocyte system. 3. Fat-storing cells.
Subscribe to:
Posts (Atom)