THE BODY: Gut - Key to a Healthy Immune System

In this episode of "THE BODY," we take a look at our longest organ – the gut. It does a lot more than process waste. Our gut brings together bacteria and immune cells to keep our immune system healthy and strong often in surprising ways. And it keeps our immune system from spinning out of control and causing chaos throughout our body. Learn how our amazing gut helps defend us against a whole host of life-threatening diseases through its hidden functions.