The magic of alveoli is that oxygen can freely enter blood vessels through alveolar wall and interstitial lung, and be transported to various organs of the body by hemoglobin. At the same time, carbon dioxide transported from various parts of the body is excreted, and other gases in the air can be isolated, such as nitrogen, which cannot enter the blood circulation. You know, the industrial separation of oxygen and nitrogen was only realized more than 200 years ago, and this function of the lung has been used for millions of years.
In addition to the extremely important and obvious respiratory function, the lung is also responsible for regulating the transport and excretion of water and liquid throughout the body. The release of lung qi makes the water and liquid transport throughout the body and be discharged from the body through sweat pores; The decrease of lung qi causes water to be transferred to the kidney and converted into urine, which is finally discharged through the bladder. The lung also has hematopoietic function, and more than half of platelets in the human body are produced in the lung.
Extended data:
As the respiratory organ of the human body, the lung is connected with the throat and nose, communicates with the outside world, and is in contact with the outside world all the time. The process of breathing and inhaling is always going on. When the lungs inhale air, oxygen and carbon dioxide are discharged from the body, and bacteria, viruses, fungi and dust may enter the lungs with the air. Streptococcus pneumoniae, Staphylococcus aureus, Escherichia coli, Klebsiella, Pseudomonas aeruginosa, etc. Entrainment in it may cause pneumonia.
Traditional Chinese medicine theory holds that "lung". Once wind, cold, heat, dampness, dryness and fire invade our skin and nose, the lungs bear the brunt.
Phoenix. Com- why the lungs?