The digestive system has several major organs that break down and absorb food, including the esophagus, stomach, small intestine, and large intestine. The esophagus transports food to the stomach, which kills bacteria and breaks food down. The small intestine, around 20 feet long, absorbs most nutrients. The large intestine absorbs water and electrolytes. The digestive system works with the circulatory system to break down food for absorption into blood. Coffee and fruits/vegetables are good for digestion, while smoking can cause diseases. Common digestive issues include Crohn's disease, irritable bowel syndrome, and hemorrhoids.