Directly or indirectly, the five zang-organs and six fu-organs are linked to the tongue by channels and tendons. The collateral of the Heart Meridian of Hand Shaoyin links the tongue root. The Kidney Meridian of Foot Shaoyin runs along the two sides of the tongue root. The Liver Meridian of Foot Jueyin connects with the tongue root. The Spleen Meridian of Foot Taiyin links the tongue root and spreads beneath the tongue. The tendons of the Triple Energizer of Hand Shaoyang enters and links the tongue body. Therefore, by inspecting the various changes of tongue manifestations, we can know the pathological changes of zang-fu organs inside the body. Please click to learn more information about TCM Meridians and Collaterals.