The navel influences the nearby organs.
The navel is also important to the small and large intestines and the major lymphatic system (Fig. 5.7). By concentrating on the navel, you can activate the life force, creating warmth and expanding pressure that en- hance digestion and absorption in the small intestine. Focusing on the navel also strengthens the large intestine for the elimination of waste material, while increasing the flow of the lymphatic system.
-From Awaken Healing Light of the Tao, by Mantak Chia