How does the human digestive system work?

The human digestive system is a complex series of organs and glands that processes food and liquids, and extracts the nutrients the body needs to function. It starts in the mouth, where the process of mechanical and chemical digestion begins. Food travels down the esophagus to the stomach, where it is further broken down by gastric juices. Then, it enters the small intestine, where nutrients are absorbed into the bloodstream. The remaining waste travels to the large intestine and is eventually expelled from the body. This process is essential for providing the body with the energy and nutrients it needs to survive.