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What Is The Function Of Food In The Body?

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Anonymous Profile
Anonymous answered
Food is one of, and if not the most important things in the body. It provides nearly all of the vital nutrients, vitamins and minerals that the body needs to keep running, and then all of the vital sugars, carbohydrates, proteins and fats that the body needs to give itself energy, grow through the splitting of cells and to keep the brain functioning.

Over eighty percent of all food that is eaten is useful to the body, and our digestive system has many different ways, methods and mechanisms to break the sandwich that we ate for lunch into its components to keep our bodies fit and healthy and able to keep up with the active lifestyle of the average human being. In the average sandwich there are sugars that give the body immediate energy; carbohydrates that the body will break down to give slow release energy; fat that the body can use to keep vital organs warm or can store to break down into sugars for quick release energy at a later time; vegetables that the body gets vital nutrients and vitamins from to promote bodily functions; and lastly dairy which will provide a source of calcium to the body to keep bones strong.

Each different part of the food is digested by the body, broken down and then absorbed into the blood, and each different type of food if broken down in a different way. First of all, digestion occurs as soon as food enters the mouth, chewing the food starts to break down the food into smaller morsels that the body can then start to attack chemically. In human saliva there are many enzymes which specialise in breaking down long chain carbohydrate molecules into shorter chain sugars, and complex proteins into basic amino acids. One such enzyme is known as salivary amylase which starts the long process of breaking down the long starch molecules from foods like bread, rice and potatoes into shorter disaccharides and trisaccharides. Food is then formed into a ball shape "bolus" which is then pushed down the oesophagus (the tube that carries food from the mouth to the stomach) through a process of contracting and relaxing the surrounding muscles, known as peristalsis. Once in the stomach, food is digested further by many more enzymes that will concentrate on a specific part of the food to break down. As well as these enzymes, the stomach is full of sulphuric acid which will break the food down further. The stomach also does a form of mechanical digestion by which is will "churn" food in the stomach by relaxing and contracting the muscles in the stomach wall. The broken down food then travels to the intestine where all the useful amino acids, glucose, proteins, vitamins and minerals are absorbed by the wall of the intestine into the blood stream through the processes of active transport, osmosis and diffusion. This leaves food that the body was unable to digest which will be egested in the form of faeces.
Selene Profile
Selene answered
Food performs four main functions: 1. Food provides the organism with the energy necessary for its activities.2. Food is essential for growth. Without food, an organism will stop growing. The living cells in our body multiply after being nourished from the food we eat.3. The body also needs food for the repair of any damage done to it, either accidentally, or through constant work. This function may also be categorised together with the previous one.4. Minerals and vitamins that exist in our food are essential for the protection of the organism against illness. 
Anonymous Profile
Anonymous answered
Food serves as our fuel,gasoline makes a car go,food makes humans go
Afzaal Ahmad Profile
Afzaal Ahmad answered
There are some necessary things for a human life to live. Food is one of the necessary things for a human to live. The other things are Water, Oxygen (or simply you can say air). First of all, the purpose of the food in a human body is to provide energy to human body to live. Without energy, human body can not live because human body needs to move or take breath or do other tasks which all need the energy to be performed.

When you eat food, you put it in your mouth and from there is goes to throat and into stomach. In the stomach, the digestion process is started. Stomach walls have the structure which makes a food soft and makes small pieces of the food. Then it goes further and food is digested from the walls. Liver produces a juice which helps to digest food. When the food is digested, the waste is remained and comes out. The digest food is mixed up with in blood and it reaches to every cell of the human body. From lungs, oxygen is added in the blood and reaches to cells of the body where food and oxygen is mixed up and produces energy to keep a human body alive.
Anonymous Profile
Anonymous answered
The function of food in the body is very important, just like cars need petrol to go, humans need energy, which we get from our food. Another important thing that we need to live is oxygen(or just air) and water. These 3 things are extremely important for humans
Anonymous Profile
Anonymous answered
For students food is very much important because in studies they have to use their brain and food helps in developement of brain and it gives energy and proper amount of nutrients to body
Anonymous Profile
Anonymous answered
Promotes growth of all body tissue
Mark Henry Profile
Mark Henry answered
It provide you all the energy you need and all essential vitamins and minerals and helps in growth

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