A person has two lungs. They are located in the chest cavity of the body and are covered with a membrane – pulmonary pleura. The pleura covers the inner surface of the chest cavity (parietal pleura), and then passes to the lung. Between the parietal and pulmonary pleura there is a gap – pleural cavity. It is filled with pleural fluid, which reduces the friction of the lungs against the walls of the chest cavity during breathing. Each lung is in a hermetically enclosed space.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.