What is surfactant substance?

From the inside, the alveoli are covered with a special (in the form of a film) substance – a surfactant. This substance prevents them from falling off (sticking together) when you exhale.

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.