After food turns into chime, it enters the small intestine.
The small intestine is a narrow tube about 20 feet in length that is divided into three segments.
But what if I told you, the digestive process starts from the mouth itself.
There are various other organs involved in the digestion process occurring in the human body. It is an important process that breaks down the proteins, fats, carbohydrates, vitamins, minerals into simpler forms so that it can be absorbed easily into the body cells.
Some digestion occurs here but very little absorption.
While the bolus is in the stomach, it is mixed with highly acidic stomach secretions to form chime.When food reaches the stomach, it stays for approximately 4 to 5 hours. The Parietal or Oxyntic Cells secrete HCl (Hydrochloric acid) and intrinsic factor that is essential for vitamin B12 absorption.There are various gastric glands in the mucosa lining of the stomach. Food in the stomach gets mixed thoroughly with the gastric juices through the churning movements of the stomach muscle.Food is broken down into smaller particles by the chewing action of teeth.As saliva is added, it mixes with the food particles, slowly moistening and lubricating the food.The mucus and the bicarbonates of the gastric juice help in protecting the mucosal epithelium from the highly acidic HCl. The different chemical reactions that take place in the stomach are summarised as follows.In the small intestine, further digestion takes place.The other enzyme, lysozyme is an antibacterial agent that prevents infections.Mastication of food and swallowing of food are the important activities that take place here in the oral cavity.Some of the activities in the process include ingestion and propulsion of food, mechanical or physical digestion, chemical digestion, absorption, and defecation.When food is taken in through the mouth, chewing and mixing of the food occurs.