digetive system essay

containing nutrients, is eaten and broken down into different components. This breakdown

makes it possible for the digested material to pass through the intestinal wall into the

blood stream. The digestive process contains many different steps that take place in many

different organs. The following steps tell the path of the famous choclate chip cookies.

The first step of digestion begins at the mouth, where the food enters the mouth. Saliva is

secreted from the salivary glands. The saliva contains enzymes such as Ptyalin, which

starts sugar digestion. The enzymes also provide lubrication to help in the chewing and

swallowing of the food. The food then goes down the esophagus and into the stomach,

where the next step of digestion takes place.

In the stomach, a mixture of hydrochloric acid and Pepsin, which is secreted by the

stomach wall, liquefies the food. At the same time, a substance called intrinsic factor binds

Vitamin B in food and various gastric enzymes, such as Pepsin (which begins protein

digestion), which are secreted by the stomach wall. Secretions of mucus protect the

stomach from its digestive enzymes. The food is then m

the small intestine, the digested products travel to the liver. Liver cells filter the blood of

moving on to the lower right side of the abdomen. At first, the pain comes and goes, but

ixed in the stomach, turning it into

chemical digestion takes place. Here, bile from the gallbladder and enzymes from the

main part of the large intestine, the colon, and the last part, the rectum. Colon cancer is

frequently or does not eat enough of certain foods that contain fiber.

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