Lung

The organ of respiration, in which the impure venous blood is oxidized by the air drawn through the trachea, bronchi, and air vesicles. There are two lungs, a right and a left, the former usually consisting of three, the latter of two lobes. The lungs are situated in the thoracic cavity, and are enveloped by the pleurae. At the root or hilum the bronchus and its arteries, and the pulmonary artery and nerves enter, and the pulmonary and bronchial veins and lymphatics leave. The lung proper consists of minute air-vesicles held in place by connective-ti ue trabecular. Capillaries traverse the walls of the air-vesicles and bring the circulating blood in close proximity to the air. The average weight of the adult right lung is 22 ounces; that of the left 20 ounces. L., Black, anthracosis of the lung. L., Coal-miner's, L., Collier's, anthracosis of the lung. L.-fever, croupous pneumonia. L. -grown, having the pleura adherent to the lungs. L., Miner's, anthracosis of the lung. L.-sick, a form of pneumonia prevalent among the oxen of South Africa. L. -struck, suffering from disease of the lungs. L. -tester, a spirometer. L.-worm, a parasitic worm in the lung. L.-wort, Lungen (lung'-eti). The name given in Indi: to a form of diarrhea, the most frequent disease ol elephants, by the trematode parasite hawksii, of. tom a See Parasites (Animas Lunula. The convex or semilunar area of a nail near the root onyx. L. of the Cardiac Valves, the delicate edge of the leaflets of the semilunar valves. L. of Gianuzzi. See Crescents of Gianuzzi. L. lacrymal is a small crest of bone separating the antrum High more from the lacrymal groove.