What is Gastrointestinal Tract?

The gastrointestinal tract is also known as the digestive tract or alimentary canal is a system in the human body responsible for the digestion and absorption of food. It is a long, hollow tube that extends from the mouth to the anus. Video link is at the bottom of the post.

The process of digestion begins in the mouth where food is mechanically broken down by chewing and mixed with saliva. From there, the food travels down the esophagus a muscular tube that connects the mouth to the stomach.

In the stomach gastric juices, including enzymes and hydrochloric acid are secreted to further break down the food. The partially digested food, called chyme then moves into the small intestine.

The small intestine is the longest part of the gastrointestinal tract and is divided into three sections: the duodenum, jejunum and ileum. Here majority of digestion and nutrient absorption take place. Enzymes from the pancreas and bile from the liver aid in the breakdown of carbohydrates, proteins, and fats. The inner lining of the small intestine has numerous tiny finger-like projections called villi, which greatly increase the surface area for nutrient absorption into the bloodstream.

After passing through the small intestine the remaining undigested food, water and waste products enter the large intestine also known as the colon. The colon absorbs water, electrolytes and some vitamins while bacteria residing in the colon help ferment undigested fiber and produce certain vitamins. The colon also plays a role in the formation and elimination of feces.

The rectum, the final portion of the gastrointestinal tract, stores feces until they are ready to be eliminated from the body through the anus during the process of defecation.

Overall, the gastrointestinal tract is a complex system that ensures the breakdown of food into smaller components, the absorption of nutrients, and the elimination of waste. Its proper functioning is crucial for maintaining overall health and well-being.

https://youtu.be/Yy2kAx1x3tw