Explain the process of digestion of food in mouth, stomach and small intestine in human body.

By Shivank Goel|Updated : August 12th, 2022

Digestion in the Mouth - 

  1. The digestion of food begins in the mouth.
  2. The saliva present in the mouth has a digestive enzyme known as salivary amylase which breaks the starch into sugar.

Digestion in Stomach -

  1. The food is stored and mixed in the stomach which is received from the esophagus with gastric juices.
  2. Mucus, hydrochloric acid, and pepsinogen are the main components of gastric juice.
  3. The bits of food are dissolved by hydrochloric acid and create an acidic medium.
  4. Pepsinogen is converted to pepsin in this medium which is the protein-digesting enzyme.
  5. The inner lining of the stomach is protected by mucus by the action of HCl.

Digestion in Small Intestine -

  1. For the complete digestion of fats, proteins, and carbohydrates, the small intestine is the site.
  2. Intestinal juice is produced from the glands which are present in the wall.
  3. Intestinal juice helps in the digestion of food further.
  4. The small intestine gets the digestive juice from the liver and pancreas which helps in mixing food.
  5. Bile juice is produced by the liver which causes the emulsification of fats and pancreatic juice is produced by the pancreas for digesting emulsified fats and proteins.
  6. The intestinal walls finally absorb the digested food.

Therefore, the process of digestion of food in the mouth, stomach, and small intestine in the human body is mentioned above.

Summary:

Explain the process of digestion of food in the Mouth, Stomach, and Small Intestine in the human body.

The process of digestion of food in the Mouth, Stomach and Small Intestine in the human body is mentioned above.

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