The lungs () is one of the zang organs described in traditional Chinese medicine. It is a functionally-defined entity and not equivalent to the anatomical organ of the same name. In the context of the zang-fu organs The Lung is a zang organ meaning it is a yin organ. Situated in the thorax, it communicates with the throat and opens into the nose. It occupies the uppermost position among the zang-fu organs, and is known as the "canopy" of the zang-fu organs. Due to the lung's position in the body, toward the back of the chest and in the upper half of the abdomen, it has yang qualities and is more yang than other zang organs besides the heart. Each zang organ is paired with a fu organ, the lung's paired organ is the large intestine. Its meridians connects with the large intestine, with which makes it internally related. The lung and large intestine are connected by two meridians, Yangming large intestine meridian of hand and the Taiyin lung meridian of hand. The Lung and its paired organ are associated with the element of metal and the emotion of grief. Each of the Five Elements have a color associated with them. Due to its association with metal, the lungs are associated with the color white. The peak time for the Lungs is from 3–5 am. Illnesses that are rooted in the lung are most commonly due to improper qi or water regulation. Common symptoms iindicating lung disease are coughing, weak voice, asthma, and fish smelling mucus or saliva. Lung functions The Lung has five principle functions: governing qi and controlling respiration. They take in clear and expel turbid Natural Air Qi (Kong Qi) controlling disseminating and descending regulating the water passages controlling the skin and body hair opening into the nose housing the Po Dominating qi and controlling respiration Dominating qi has two aspects: dominating the qi of respiration and dominating the qi of the entire body. Dominating the qi of respiration means the lung is a respiratory organ through which the qi of the exterior and the qi from the interior are able to mingle. Via the lung, the body inhales clear qi from the natural environment and exhales waste qi from the interior of the body. Dominating qi of the entire body means that the function of the lung in respiration greatly influences the functional activities of the