the journey of a cheese sandwich

The journey of a cheese sandwich!!!
(Mid-topic assessment)
How does a cheese sandwich travel through our digestive systems?
A Cheese Sandwich
A cheese sandwich includes a lot of nutrients that we need in a balanced diet. The cheese sandwich is made of bread, cheese and butter. Each ingredient in the sandwich carries different nutrients. The bread is in the carbohydrates group which means it contains starch and glucose. The cheese and butter is in the dairy food group, so it contains fat and protein. Our body needs these nutrients because we use it for growth, maintenance of healthy tissues and energy.
Balanced Diet and Nutrients
A balanced diet contains all the nutrients you need in the right proportion. A balanced diet includes carbohydrates, protein, fat, minerals, vitamins, water and fibre. Without proper nutrition, your body can't survive. When you eat a balanced diet, your body obtains the fuel and nutrients it needs to accomplish various tasks. For example, carbohydrates provide a lot of energy, protein are for growth and repair, fats produce a lot of energy to make cell membranes, vitamins in small amount for cells to work properly, minerals in small amount to make body chemicals and fibre to keep bowels working properly. Water is another essential component of your diet. Without it, your body can't flush out toxins, transport nutrients to cells or perform other vital bodily processes
The Start
The whole journey of the cheese sandwich starts from the mouth. First of all the cheese sandwich is chewed by the teeth and is ingested. The enzyme amylase in the saliva which breaks down substances like starch into glucose. This makes it easier to swallow.
Then it passes through the gullet, also called the oesophagus which is like a long tube located in the throat. The walls of the gullet contract to move the food down into the stomach. This only takes about seconds.
The next main part of the journey starts at the stomach. A lot of things happen in here. The stomach crushes the food with it muscular walls. Muscle contraction stirs up the acids and enzymes liquefying most of the food. The stomach is like a J shaped bag and is located under the ribs. Amylase, protease, carbohydrase and hydrochloric acid are found in the stomach. The hydrochloric acid makes sure that it kills the bacteria in the food and give the right PH for the protease enzyme to work.

The next stop is the small intestines. Here it digest the food into smaller molecules. Smaller molecules as in glucose from carbohydrates, amino acids from protein and fatty acids from fat. The surface of the small intestine has many tight folds that can absorb nutrients and water. When it enters the small intestines it first enters the duodenum, the first part of the small intestines. Then it passes to the second part, the ileum. In the ileum there are tiny little cells together called the villi. This absorbs the nutrients into the blood. The cells of the villi is thin, so that the nutrients can get in (absorbed).
There are lots of enzymes in the small intestine which are mixed with the food. The nutrients are released and absorbed from the food and is passed to the blood. Remains of undigested food are squeezed by the muscles around the intestine, through to the large intestine. The small intestine is located under the stomach and is followed by the large intestine.
The liver makes a green liquid called the bile. Bile and digestive enzymes from the pancreas help release the nutrients from the food so that they can be absorbed and circulated around the body, in the blood stream.

The End
Towards the end, the indigestible parts are transported into the large intestine. The large intestine absorbs extra fluid to produce the solid waste we know as faeces. It takes days for waste to move through the large intestine. The large intestine has three main parts. First is a pouch called the cecum, which is the home to the appendix. Next comes the colon, which has three sections: ascending, transverse and descending. In the first two sections, salts and fluids are absorbed from the indigestible food. Billions of bacteria that normally live in the colon help to ferment and absorb substances like fibre. The third part of the large intestine: the rectum. Here, your faeces wait to be excreted through the anus in your next bowel movement