Digestive System

The digestive system is the the group of organs that changes food to

carbohydrates, fats, and proteins and used by our body. Digestion takes

places begins form our mouth and ends with our anus. the function of our

digestion system are to ingest food, digest into nutrients, cross our plasma

mambranes, absorb nutrients and eliminate indigestible remains. our stomach

is our main organ because it mixes the food and breaks down into unis tha

can be taken into carbohydrates, fats and proteins which can be used by our

body.

There are different parts of main organs of our digestive system, esophagus,

stomach, large intestines, small intestine, liver, pancrea and finally our

anus. As our digestion begins in our mouth, the food is cut an dchopped by

our teeth. Our tongue helps mix the food with saliva so it can be swallowed

easily. From our mouth, the food is swalllowed into a transportube called

esophagus. Esophagus actually carried food to our stomach, through before

that there is a flap called epiglottis which is an air passage and the food

passage in the pharynx. when you swallow, the air passage will

automatically blocked by itself so the food won't enter the esophagus though

our air way.

Our stomach is shaped as a J- shaped organs, when food is present, the

stomach will mixing food with gastric juice, after that it will churns food

into a liquid called chyme, and it will leaves the stomach enters the small

intestine. the small intestine is a longest part of our digestive tract of

human. food remains in the small intestine for several hours. Two lasrge

galnds are the liver and the pancreas, which connect with the small

intestine by ducts or tubes. Fluid from the ancreas is called pancreatic

juice. fluid from the liver is called bile. bile is stored in the

gallblader helps digest carbohydrates, proteins and fats. Inside the small

intestine, there's a lot of fingerlike folds called vili. the digested food

is passed through the cell membranes of the villi into the blood, which cary

it to cells. The body can then use the food for energy and growth.

Material now form small intestine passed into the large ntestine. the large

intestine is made up of ascending colon, the transverse colon, an dthe

descending colon. Here most of the water that was mixed with the food is

removed through the walls of the large intestine. the waste is turned into

solids that are passed form the body by excretion.

Our body requires three major classesof maronutrition which are

carbohydrate, protein and fat. miconutrition such as vitamins and minerals

also nessary for optimum cellular metabolisim. Now aday, there are more and

more people become interested in eating for good health. A diet is a natural

supplemented by vitamins minerals and health food. all natural foods such

as vegetables, fruits, nuts, grains, eggs milk, seafood, and meat. The

variety of nutrition ensures many nutrients are need for all body processes.

Several nutritional studiesthat a result of imbalance diet which may cause

into diseases, illneses and cancer. Therefore, a good diet plan is

important. A good dietary recomendations is go by the food guide pyramid-a

guide to daily food choices. An ideal diet include grains, fruits and

vegetables in the diet. meats and dairy proucts are needed in limited and

at last fats, sweets and oils product. Most of the time, a vegetarian diet

is recommended because vegetables and fruits contains fiber, vitamins and

mineral.

One of the maronutrient is carbohydrates. Cabohydrates are digested to

simple sugar and converted to glucose. Glucose is stored by the liver. To

reduce cabohydrats: 1. eat fewer sugar, 2. eat fresh food instead of canned

fruit with syrup.

Second important maronutrient is protein. Food in protein include meat,

fish , dairy product, nuts......most of our strutural proteins found in

muscles, skin, hair and nails.

Third is fat. Fat and cholesterol are both lipids. Fat is not just found

in buttle or oil, it can also flund in animals protein. Sometimes we have

to be very careful of what we eat, although fat is needed in our human body

but it could be also increase the risk of colon, pancreative cancer. Here

are some dietary to reduce fat, limit your intake of oil and butter, remove

skin from poultry, eat non-fat or low fat food and use stream, broil or bake

rather then fry.

I think being eating regularly and healthy is important. we should follow

the pyramid guide to follow what we need everyday for nutrition.