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
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
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...