Human Digestive System

body systems · food · science

Three Amazing Phases. Digestion happens in three stages: the cephalic phase starts when you see or smell food and your mouth waters, the gastric phase happens in your stomach where food gets churned and broken down, and the intestinal phase is where the final nutrients get absorbed into your bloodstream.

Long Journey Inside. Your digestive system is a special pathway called the gastrointestinal tract that runs from your mouth all the way to your end, and it's about 30 feet long when completely uncoiled.

Teamwork Breaks Food Down. The main digestive tract gets help from accessory organs like your stomach, liver, and pancreas, which work together like a team to turn the sandwich you ate into nutrients your body can use for energy and growth.

Smaller and Smaller Pieces. Digestion is all about breaking food into smaller and smaller pieces through both physical chewing and chemical reactions, until the nutrients are tiny enough for your intestines to absorb them.

Your Brain Starts It. Before you even swallow, your brain is already preparing your digestive system by making your mouth water and sending signals to get your stomach ready to work.