- When we eat, we chew our food into smaller chunks, which are easy to digest. Our saliva breaks down the food into a form that our body can use and absorb. The food travels from our tongue through our throat and esophagus. Food is delivered to our stomach through a process known as peristalsis. Acid and enzymes are secreted by the cells in the lining of our stomach, which are responsible for the breakdown process. Once it has been processed, the food is released into the small intestine. Food is digested in the small intestine through the bile from the liver and enzymes from the pancreas. After passing through the small intestine, the contents change from semi-solid to liquid. Once the nutrients have been absorbed in the small intestine, the leftover-food residue liquid then moves to the large intestine or colon. Water is removed from the stool as it moves through the colon. The sigmoid colon stores the stool until it is discharged into the rectum, where the process of elimination begins.
- The jejunum and lower ileum of the small intestine are primarily responsible for absorbing nutrients into the bloodstream. To aid in the digestion process, the small intestine's muscles combine food with digestive juices produced by the pancreas, liver, and intestine. The nutrients that have been digested are absorbed into the bloodstream by the small intestine's walls. The nutrients are transported throughout the body via the blood.
References:
https://my.clevelandclinic.org/health/body/7041-digestive-system