Why is a cell the main structural unit of a living organism?

A cell is the basic structural unit of a living organism because. it has all the characteristics of a living thing. The cell is an open, self-regulating and self-reproducing system.

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.