The digestive system is the group of organs in your body that work together to break down food into tiny particles your body can use for energy, growth, and repair. Think of it as a processing factory that runs from your mouth to the other end, transforming a sandwich or an apple into the fuel your cells need to keep you alive.

The journey starts when you chew food in your mouth, where saliva begins breaking it down chemically. Then it travels down your esophagus (a muscular tube) into your stomach, where powerful acids and churning muscles continue the work. From there, the partially digested food moves into your small intestine, a long, coiled tube where most nutrients get absorbed into your bloodstream. Your large intestine handles what's left, absorbing water and preparing waste for removal.

Several other organs help this process without food passing directly through them. Your liver produces bile to break down fats, your pancreas makes enzymes that help digest proteins and carbohydrates, and your gallbladder stores bile until it's needed. Together, these organs form an efficient system that extracts nutrition from everything you eat, from breakfast cereal to birthday cake, and powers every activity you do, whether you're running, thinking, or sleeping.