When functioning as they are designed to function, our healthy human intestines serve the role of both a barrier and a filter. ⛔ A layer of cells form a mucus barrier, consisting of intercellular tight junctions similar to thread fibers that come together to form a piece of cloth. 🧵 The intestines open and close their tight little junctions to allow nutrients to be absorbed from the food that passes through our gut, as well as block the absorption of toxins like partially digested foods, pollen