how quickly can food pass through the digestive system?
374197
I do not think the gas can come right afterward.  Gas is a combination of gases, like methane.  These gases are the byproducts of digestion by the bacteria in your digestive tract.  They can digest complex carbohydrates that your digestive can't.  The thing is that these bacteria do not reside in your stomach or small intestine.  Only your large intestine or colon.  Therefore, the food has to make it all the way to the colon before this can happen.  This would take more than just a few hours.  I would think more like 12 - 24.
852357
chewing has a number of functions - some mentioned in the other answers; it breaks food into smaller pieces so we can swallow, it mixes food with the enzyme amylase to begin the chemical digestion of carbohydrates, but one other important function is that by chewing, the mouth increases the surface area to volume ratio of the food particles.  This provides more surface area for enzymes to act on, and therefore, speeds up the rate of digestion throughout the digestive system.
727761
A walk would be great. No strenous exercise, no longer than 15mins.  The stomach and digestive system need energy to function, so they need blood..if you workout too hard or too long, the blood is needed in the muscles, and pulls it away from digestion.  The act of eating and digestion itself raises your metabolism. So walking would increase blood flow, and help things get started a little faster.
463302
How is food carried on through the alimentary canal? Simple.\n\nThrough the process of peristalsis. Peristalsis is crudely defined as the waves of involuntary muscle contractions that transport food, waste matter, or other contents through a tube-shaped organ such as the intestine.\n\nMicrosoft® Encarta® Reference Library 2004. © 1993-2003 Microsoft Corporation. All rights reserved.
841233
Depends on a lot of things like temperature, humidity, if bacteria/fungus capable of decomposing are present, how large the person is, when the last time they ate was, fat decomposes at different speeds then flesh and muscle and cause of death. Usually, for an unburied body 8-12 days.\n\nAlso you can have other animals (and plants) that will speed up the process. \n\nLots of insects can devourer a corpse in under a week but this may not fall under your definition of decomp. \n\nSome chemicals like strong highly concentrated acids and bases can liquefy a body in a couple of hours.\n\nFor micro organism decomposition (bacteria, fungi, excreta.) keeping the corpse warm and moist a corpse can be gone in 5-12 days above ground.\n\nIf the body is buried it takes longer to decompose, if it is contained (like in a coffin) it takes even longer. "Although an exposed human body in optimum conditions can be reduced to bone in 10 days, a body that is buried 1.2 m under the ground retains most of its tissue for a year" (quote from the web page I list as a source)\n\nIf the body is embalmed it may take a several months before it is mostly decomposed.\n\nReally this all comes down to when and how you consider a corpse decomposed.\n\nThere are many different stages of decomp. These not all stages are present in all cases, for instance you can have external decomp and internal together or just one at a time.\n\n*---*---*---*\nWarning- this part in may be gruesome:\n*---*---*---*\nAssuming a body left untouched, died of natural causes:\n\nPale skin will show up with in minutes of death because blood has stopped circulating.\n\nTypically the internal flesh of the large intestine will start first. Our intestine is littered with rotting/decaying organic matter all the time (poop) and our body is only able to stop the bacteria from rotting us when we are alive.\n\nWhen our digestive tract bursts it will release digestive enzymes that will digest our internal body most efficiently if our body is kept at living body temperature. This is where temperature can mean the difference in days and months of decomp. The body will release bile, which has a particularly awful smell. \n\nGas from bacteria make the corpse bloat up with hydrogen sulphide, methane, cadaverine and putrescine. Fat cells will liquefy and bacteria will thrive on them, the bacteria in our colon (large intestine) will have a field day. This is where the body will really start to stink.\n\nThe external flesh starts to decompose shortly after death this is because we have millions of bacteria on us all the time. Colonies of bacteria will form first in small circles in places that are the most moist and warm (mouth, arm pits, lungs). \n\nThe smell of the rotting corpse will attract Demetrius organisms like flies who will use their own vomit (actually regurgitate digestive enzymes) to assist in decomp with the purpose of making it easier for the fly to digest, and then they will lay eggs. When the larvae hatch it may be only a few days more until the corpse is simply bones, teeth, hair and finger/toe nails.\n\nOver time (many years) the bones will dry out, crack and crumble to become dust, and the corpse is no more.\n\nwww.deathonline.net lists the following stages of decomp.\nStages of Decompostion \nLiving\nInitial decay\nPutrefaction\nBlack putrefaction\nButyric fermentation\nDry decay\n\nwww.bbc.co.uk/health/ask_the_doctor/decompostionafterdeath.shtml states that "Decomposition in the air is twice as fast as when the body is under water and four times as fast as underground."
451607
This depends on your metabolism, eating and exercise habits, and, typically, gender. A short general answer is: eat more (especially complex carbohydrates and protein, c. 30% and 40% of daily intake, in five or six relatively small meals throughout the day, timed to maximize digestion 30-60 min. after workouts), and exercise regularly but with rest for major muscle groups (e.g. 1: back and biceps; 2: rest/cardio; 3: chest and triceps; 4: rest/cardio; 5: shoulders; 6: rest; 7: legs). Above all, the answer depends on your particular goals, body type, and determination. Good luck!
771281
Some molecules (but not many) can be absorbed through the stomach lining.  Glucose isn't absorbed from food until it enters the small intestine.\n\nThe main kinds of things that are absorbed through the stomach lining are small non-polar uncharged molecules.  Glucose can only cross cell membranes if the membrane has a glucose transporter protein.
789560
The body begins to canabalize itself, starting with muscle tissue and then fat I believe.  Forty days is probably close to the limit for survival if not well beyond it.  Dehydration will kill much more quickly though, more like 3-4 days if I'm not mistaken.
44806
Fast digestion ! What do  you mean actualy.  If it is fast there will be no time for absorbtion.  If the movements are faster you will be getting diarrhoea.
393578
Some people don't realize this but most of us eat way too fast. It takes about 20-30 minutes for the food to digest and our body to tell us we're full. By eating slower you may notice that you get full just as much while eating alot less.\n\nAlso instead of going for 3 large meals try 6 smaller meals. This way you're body will burn off the calories it consumes instead of letting it sit and turn into fat over time.\n\nAlso drinking cold water helps to burn calories. By replacing soda and juices full of sugar with 8-9 glasses of cold water a day you will find that it adds up.\n\nAlso eating food rich in Vitamin B6 (I think it's B6) will help your metabolism which can also help you burn more calories.\n\nIt's really not difficult, you don't need any of these insane diets or pills or specials excerises. All you need to do is be sensible with what you put inside you and stay active.\n\nGood luck :)
726176
Blood travels at different speeds in all different types of vessels.  Fastest in arteries, slower in arterioles, VERY slow in capillaries, then faster in venules, and faster again in veins.\n\nfrom 425 cm/sec in the aorta to about less than 1 mm/min in capillaries is a decent range i think.
624579
The stomach will never digest most liquids.\n\nThe stomach's digestive ability is largely restricted to proteins. It has almost no ability to digest fats and a very, very limited ability to digest carbohydrates.\n\nSo a liquid like milk that contains fats and carbohydrates as well as proteins will simply never be digested in the stomach. It could sit there for days without being broken down. Maybe, just maybe, if milk could  sit in the stomach for weeks the acid would eventually break down the sugars and fats in the milk, but it's not certain.\n\nThe point you really need to appreciate is that the stomach is only the second in a very long line of organs that are required to digest food.
570374
In humans, digestion begins in the mouth where food is chewed (mastication) with the teeth. The process stimulates exocrine glands in the mouth to release digestive enzymes such as salivary amylase, which aid in the breakdown of food, particularly carbohydrates. Chewing (mechanical) also causes the release of saliva, which helps condense food into a bolus that can be easily passed through the oesophagus. The oesophagus is about 20 centimeters long. The food is pushed down by a movement called peristalsis, which is the wave-like contraction of smooth muscle tissue, characteristic of the digestive system.\n\nThe food enters the stomach upon passage through the cardiac sphincter. In the stomach, food is churned and thoroughly mixed with a digestive fluid, composed chiefly of hydrochloric acid, and other digestive enzymes to further decompose it chemically for a few hours. As the acidic level changes in the stomach and later parts of the digestive tract, more enzymes are activated or deactivated to extract and process various nutrients.\n\nAfter being processed in the stomach, food is passed to the small intestine via peristalsis. This is where most of the digestive process occurs. It passes through the pyloric sphincter and enters the first 10 inches of the small intestine, the duodenum, where it is further mixed with 3 different liquids, which are bile (which helps aid in fat digestion, otherwise known as emulsification), pancreatic juice (made by the pancreas), and intestinal juice. They also add several enzymes: maltase, lactase and sucrase, to process sugars. Trypsin and chymotrypsin are other enzymes added in the small intestine. (Bile also contains pigments that are by-products of red blood cell destruction in the liver; these bile pigments are eliminated from the body with the feces.) Most nutrient absorption takes place in the small intestine. The nutrients pass through the small intestine's wall, containing small, finger-like structures called villi. The blood, which has absorbed nutrients, is carried away from the small intestine via the hepatic portal vein and goes to the liver for filtering, removal of toxins, and nutrient processing.\n\nAfter going through the small intestine, the food then goes to the large intestine. The large intestine has 3 parts: the cecum (or pouch that forms the T-junction with the small intestine), the colon, and the rectum. In the large intestine, water is reabsorbed, and the foods that cannot go thorugh the villi such as fiber, can be stored in large intestine. Fiber helps to keep the food moving through the G.I. tract. The food that cannot be broken down is called feces. Feces is stored in the rectum until it is expelled through the anus.
109948
Assuming the total number of calories, and the general distribution of necessary nutrients is the same, I think many small meals is easier on your digestion, and gives you less of the ups and downs of blood sugar and protein to the brain than two or three large meals.  Ever notice how people tend to fall asleep after a large meal?  That's because the blood is diverted from the brain to the digestive system, leaving them stupid and sleepy.
1060052
0 days. There is always a fresh supply. It is secreted into your mouth and swallowed almost immediately.
478710
Certain types of food poissoning can take 24 hours to show up.  You should check www.webmd.com & they'll give you a lot of good answers
318703
it is better if you walk before eating food.coz the intake of food causes blood supply to the digestive system ,increase by many folds,major part of the blood in the circulatory system[body] is diverted to digestive tract.so it is best to rest after eating so that heart is not over loaded with additional work of supplying blood to active walking muscles. it is advisable to rest for one hour after walking to eat food. and rest for 1 to 2 hours after taking meal.