Gas exchange is the exchange of gases between the body and the environment. From the environment, oxygen is continuously supplied to the body, which is consumed by all cells, organs and tissues; carbon dioxide formed in it and a small amount of other gaseous metabolic products are released from the body.
The chest performs a protective function. Protects the lungs from external aggressive factors. When inhaled, it is displaced, since the air flow going into the lungs leads to deformation of the chest.
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.