The Importance of the Lymphatic System As the largest circulatory system in the body, the lymphatic system plays an integral role in digestion, detoxification and the delivery of nutrients, like fats, for stable, lasting energy. The lymph starts as small finger-like projections, called lacteals, which run along the inside of the digestive tract. The lacteals absorb and transport both nutritional and toxic fats, lipids and proteins off the intestinal tract and into the lymph surrounding the intestines. Undigested proteins, like gluten and casein, along with toxic fats, can take a major toll on the lymph. When these are not completely...