The Digestive Tract

Your body’s longest assembly line is about 30 feet long. Most people have no idea what happens along the way.

Think of the digestive tract as a long industrial corridor — one continuous tube, roughly thirty feet from end to end, with specialized departments doing very different jobs as material moves through. Some departments break things down. Some extract what the body needs. One department at the far end handles disposal. The whole operation runs on a combination of chemistry, muscle, and a surprisingly sophisticated network of nerves that reports directly to the brain.

Most people know they have a stomach and a colon. What happens in between is less clear.

That’s what we’re here for.

A note before we begin. The digestive tract is actually three major structures — the stomach, the small bowel, and the colon — each with its own distinct architecture and function. A thorough examination of each could fill separate essays, and probably will someday in book form. For now, we’ll treat them as the unified system they are. That’s not cutting corners. That’s how the body actually experiences it.

Where we left off…