Anyone who is healthy breathes automatically – without thinking about what the lungs do. Some even blame the vital organ for exertions such as smoking. This can lead to mortal danger in diseases of the lungs and respiratory tract.
The human lungs: every day in adults, around 10 000 liters of air flow through.
Without realizing it, adult, healthy people breathe at rest about 12 to 16 times a minute. Each time, about half a liter of air flows through the airways into the lungs and out again.
Construction and location
Physicians refer to all parts of the body, which are traversed by the inhalation and exhalation of air as airways: Through the mouth and nose, the air passes through the throat into the trachea. The trachea lies behind the breastbone and divides in the thorax into a left and a right main bronchus. These lead together with the respective pulmonary vessels to the left or right lung.
The lung (Latin: Pulmo) is in fact paired. Each of the two lungs is supplied with its own blood vessels and, with the respective main bronchus, also has its own air supply, which enters the lungs together with the veins and arteries at the so-called pulmonary hilum. The left lung is slightly smaller than the right and consists of only two instead of three lobes because in its vicinity the heart is located and thus less space available. Each main bronchus divides according to the number of lung lobes in so-called lobe bronchi and then branches out into Segementbronchien and ever smaller bronchi and bronchioli until at the end of the small alveoli, the so-called alveoli.
They are the place where the lung performs its most important function, the gas exchange, giving the lung tissue its spongy appearance.
What are the job of the lungs and respiratory system?
The airways not only carry air into the lungs, but cilia on their walls also purify the air. Foreign matter such as bacteria and dust particles remain hanging in it and are transported along with the lying on the cilia on the pharynx throat direction. He is either swallowed unnoticed or – for example, if the cilia are unable to afford the transport – coughed off.
The most important task of the lung is the gas exchange. Since our body needs a lot of oxygen and has to excrete corresponding amounts of carbon dioxide, a large area is necessary for this. These provide the alveoli. They have very thin walls that almost directly border the blood vessels. This makes it possible for the oxygen from the respiratory air to pass through these walls into the oxygen-poor blood of the pulmonary vessels, while the carbon dioxide passes from the blood into the alveoli.
Pulmonary and respiratory diseases
If the lungs become infected, it can hinder breathing and even have life-threatening consequences. It is not for nothing that lung and bronchial cancers, chronic obstructive pulmonary diseases and pneumonia are among the ten leading causes of death in Germany. One of the most important risk factors for lung disease is smoking. Because tobacco smoke not only favors the development of malignant diseases such as lung cancer but also damages, among other things, the cilia, which transport phlegm and pathogens outside. This increases the risk of infection. Certain lung diseases such as Chronic Obstructive Pulmonary Disease (COPD) are very often the result of many years of smoking. If you want to do something good for your lungs, then you should do without cigarettes and similar tobacco products.