Science Bees: The Small Intestine — Where Digestion Really Happens (Ep. 36)

After food leaves your stomach, it's not finished being digested yet. It still has a big job ahead of it. That job happens in the small intestine. The small intestine is a long, coiled tube where most of your food's digestion and nutrient absorption actually take place. Here's something interesting: Even though it's called "small," the small intestine is actually the longest part of your digestive tract. It's just narrower than the large intestine, which is why it got its name. When food arrives from the stomach, it's already partly broken down. The small intestine finishes the job. It uses enzymes and other chemicals to break food down even further, into tiny nutrients your body can use. Then, those nutrients pass through the walls of the small intestine and into your bloodstream. Here's a great fact: The inside of the small intestine is covered in tiny, finger-like structures called villi. Villi dramatically increase the surface area inside the intestine, which helps your body absorb nutrients much more efficiently. And here's another cool fact: In adults, the small intestine can be over 20 feet long—that's longer than a school bus is wide! 🧠 Science Bee Challenge! I am the longest part of the digestive tract, even though my name says "small." I'm covered in tiny structures called villi. I absorb nutrients into your bloodstream. What am I? ... The small intestine!