for food to be absorbed by your body what must occur?

Answer:
It must enter your body and be processed by your living digestive system, that is, assuming you are still alive, for after having pondered this question - you may - or may not have grasped the idea of eating, so you may in fact be dead by now, due to malnutrition.

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http://www.kidshealth.org/teen/your_body...

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You must eat it.

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You must eat first .. . .

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Digestion

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digestion.

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Digestion and metabolism. The food is broken down into small pieces in your mouth and then passed down to the stomach. In stomach very powerful enzymes consume the food and break it down into Glucose which is the form of food to the body. Then this glucose is obsorbed by the body cells.

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First mixed with saliva for inital breakdown and mashing (chewing) to increase surface area, then.It actually depends on what "food":Carbohydrates need to be broken down to simple sugars
- amylase and others
- some sugars need other molecules for transport (glucose needs sodium, but not fructose)
Fats need to be emulsified (into micelles)
- mixed with bile
Proteins need to be broken down into smaller fragments
- trypsin, pepsin and the like

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Food is broken down in your digestive system, which is a very
complex part of your stomach. Digestive system is a long oragan
which is like a hose, which is full of enzymes %26 acids that break
down food deposits as they travel through. The waste comes out
your rear and the rest is absorbed into your body for fuel %26 energy. Best I can remember.

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First mechanical digestion occurs in the mouth where food is chewed into bits. Food is then slightly modified by the saliva's amylase. After which it goes down the esophagus and through the stomach where separation of nutrients is done. This is called chemical digestion. Mostly fats is dissolved. Secretion of the bile for the proteins and other chemical fluids occur mostly on the first length of the small intestines. Before the large intestines, mostly all of the food nutrients (simplified forms of carbos, fats and proteins) are absorbed. Lastly water and some ions are reabsorbed by the large intestine. I think that's all.

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First you must masticate or chew your food, this causes the release of amylaze enzymes which start to break down the carbohydrates, next peristalsis or swallowing occurs and food travels through the cardiac sphincter, then the food enters the stomach where regae folds actively break down the food (muscle contractions, same as in hunger pangs), next hydrochloric acid is released into the stomach which again helps to break down the food meanwhile pepsin is released to break down the proteins(i also believe that some kind of base is released later to cancel out the HCl, it also helps to break down the protein, during this time water, alcohol and asprins can be absorbed directly into the bloodstream through the stomach walls. Next it travels through the pyloric sphincter into the duodenum (the beginning part of the small intestine) as chyme where bile from the gall bladder, and trypsin, erepsin, lactase, maltase, sucrase and chymotripsin are added among others. Next the broken down molecules are absorbed by the villi on the small intestine walls sent to the liver for purification and carried through out the body. Next it travels throught the large intestine where water is absorbed and vitamin b and other vitamins are made by the bacteria inhabitting your colon and other rectal regions. Then you excrete the left over material. Some substances can't be digested and this helps to clean out the large intestine. Things like stringy vegetables and fibrous substances (roughage) can't be digested easily.

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the food is absorbed in the intestines after it is broken down in the the stomach. whatever cannot be absorbed is excreted. the amount of time spent in the intestines also contribute to the amount absorbed. thus, people with fast metabolisms will excrete quicker and have less absorbed.

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