science11guide
The human digestive system is a series of organs working together to break down food for nutrient absorption. The process begins in the mouth, where food is chewed and mixed with saliva. Swallowing transports the food through the esophagus to the stomach, where gastric juices aid in further breakdown. The semi-liquid mixture, called chyme, moves to the small intestine, where enzymes from the pancreas and bile from the liver assist in nutrient absorption. The liver produces bile, stored in the gallbladder, to aid in fat digestion. Remaining material enters the large intestine, where water is absorbed, forming feces. Feces are stored in the rectum until expelled through the anus during defecation. The digestive system ensures the body extracts essential nutrients for growth and energy from the food we consume.