What is the essence of metabolism?

This is a set of complex processes involving the synthesis of organic substances and their decay with the release of energy. At the same time, nutrients come from the external environment, undergo enzymatic decomposition and proteins, fats and carbohydrates characteristic of this organism are synthesized from simple substances.

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.