The lungs are the organs that exhale oxygen and expel carbon dioxide, which are essential for maintaining cellular functions throughout the body. In other words if the lungs are not working properly, the organs of the whole body will have problems. The synonym for a person dying is breathing and heartbeat stopping, so the respiratory system is very important. Healthy people under normal circumstances, some twenty days without food can survive, and even ten or eight days without water can sustain life. But no one five minutes without breathing can still live. Breathing environment air clean than food safety and drinking water is more important. We all know that food is not safe, there are chemical fertilizers, pesticide pollution, drinking water also has problems, but air pollution may be more imminent than the first few problems. Therefore, to create a harmonious society and put people first, managing air pollution is an unavoidable problem. We all have big houses to live in and nice cars to drive, but people are living sickly, so what’s the point. Deaths caused by lung cancer are the first among tumors in China, and deaths caused by chronic obstructive pulmonary disease are the fourth among all diseases, and they are more serious in rural areas, and there is a rising trend. I am specialized in respiratory medicine and critical care medicine, and I found that the final direct death from many diseases is often caused by lung infection and respiratory failure. Based on the above reasons, a person should treat his or her lungs well, protect them and not abuse them. Smoking is lung abuse. A person who smokes 15-20 cigarettes a day is 14 times more likely to die from lung, oral cavity or throat cancer than a non-smoker. Esophageal cancer is four times greater, bladder cancer, heart disease is twice as large; smoking later causes bronchial smooth muscle hyperplasia, airway obstruction, reducing cilia function. The human bronchial tubes have many cilia, which keep swinging. The cilia keep oscillating in order to transport the phlegm from the cells to the trachea, so that we can cough it up. After smoking, the cilia swing is weakened, so this is the most direct harm. To some environmental pollution places, you breathe in the dirty things, is also abuse. You have to exercise your lungs to live a long and healthy life. People’s lung capacity decreases year by year after adulthood, but the reduction to a certain extent will be very troublesome, assuming that the lung capacity is only about one liter, it is difficult to cough, not coughing is very difficult to expel phlegm, can not expel phlegm will cause lung infection. So when people are old, they still want to increase their lung function, they need to exercise properly. Proper physical exercise can increase lung capacity. Swimmer Phelps’ lung capacity is probably more than twice as large as ours to do such strenuous exercise. Even the elderly can participate in activities like tai chi and walking, and proper activity can slow the decline of lung function. The easiest way to test the lung function of the elderly is to open your mouth to the maximum and see if you can blow out the match, if you can blow out the match, it proves that the lung function is still okay and you can discharge phlegm normally. As the saying goes, people live for one breath. Friends, it is very important to take care of your lungs, if you have problems, please find a respiratory specialist.