The Digestive System Essay

840 words - 4 pages

The human digestive system can be described as a tube divided into several specialized

sections. As humans, we are consumers and need energy. To keep the cells in our body

alive we eat food which supplies us energy. When we digest food, our digestive system

breaks down food into small molecules so they can then move into the blood stream.

Major organs in the digestive system are the mouth, esophagus, stomach, small

intestine, large intestine, rectum, and anus. Food passes through all of these organs. The

other organs in the digestive system such as the liver, pancreas, and gallbladder produce

and store enzymes and chemicals that help break down food as it ...view middle of the document...

The mechanical digestion is when

your tongue and teeth break food up into small pieces. Then the chemical digestion

begins as you chew. The tongue moves food around and mixes it with saliva. Saliva

contains three sets of glands which are: sublingual gland, submandibular duct, and

submandibular gland. Saliva is made up of mostly water, mucus, and enzymes salivary

amylase, the food that is swallowed is passed into your esophagus. This is the process of

indigestion.

Now it’s time for the process of digestion! Did you know you esophagus, a muscular

tube, is about 25 cm long? Amazing isn’t it! Food passes to your stomach in about four to

10 seconds. A squeezing action takes place in the esophagus and these waves are called

peristalsis. It moves food throughout the digestive system.

The stomach is a muscular bag where mechanical and chemical digestions take place.

Food is mixed with digestive juices that include hydrochloric acid and enzymes. After

mucus has protected the stomach from strong digestive juices, food has been passed

through the stomach. The food has then been changed into a watery liquid called chyme.

When the chyme moves out of your stomach it then moves into the first part of your small

intestine which is called, duodenum. Duodenum is the major place where digestion takes

place.
The liver produces greenish fluid called bile which is stored in a small sac called the

gallbladder. The bile breaks up the particles that the stomach creates from fat. The

process is called emulsification. The small intestine has fingerlike...

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