Second to the heart, the lungs are the most vitally important organ in the human body. Consisting of the bronchial tree surrounded by delicate sacs (alveoli), and protected by the rigid outer ribcage, the lungs act as a leading source of oxygen for the body as well as a detoxifying mechanism, expelling harmful agents. One of the most important actions it is responsible for is the inner balance of oxygen and carbon dioxide. Breathing Exercises for the Lungs The therapeutic mot