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建立人际资源圈Digestive_System
2013-11-13 来源: 类别: 更多范文
Digestive System
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 that
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
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