Makeup of the digestive system and how it works.
The digestive system is the system in the body that takes care of all the food that we consume and puts it into good use in the body. It is made up of the gastrointestinal tract also known as the digestive tract. It is made up of the liver, pancreas and gallbladder.
The gastrointestinal (GI) tract is a group of hollow organs joined in a long twisting tube from the mouth to the anus. The organs that make up the (GI) tract include the mouth, esophagus, stomach, small intestines, large intestines which includes the anus and the rectum.
We get food into the body through the mouth here the food is broken down into smaller pieces through chewing. Also the digestion of starches begins here because the saliva has an enzyme that aids in this. The saliva also helps in moistening the food so that it can move down more easily in the esophagus.
Once we swallow the food it passes through the esophagus in a process called peristalsis, which is an involuntary movement of this muscular tube in wave like movements in order to allow food to get to the stomach. Once in the stomach the food is mixed with the digestive juices. Glands in the stomach lining produce acids that kill any harmful pathogens in the food and also produce enzymes that aid in the digestion of proteins. Food stays in the stomach for three to four hours and by then it has been turned into a creamy liquid called chyme.
Subsequently the chyme goes into the duodenum which is the first part of the small intestines here the digestion of starch continues with the help of digestive juices from the liver and pancreas. Also the digestion of fats and proteins happens here.
Consequently the food is moved to the ileum as its digestion is complete. The soluble particles are absorbed into the bloodstream including water and mineral salts through the ileum and transported into different parts of the body for use or for further chemical breakdown.
The waste material passes the small intestines and is taken to the large intestines where further absorption of water and mineral salts occurs then the dry waste is taken to the anus for excretion. Therefore digestion is complete!