What are the main features of hormones?

Hormones are produced by the endocrine glands and enter the tissue fluid or blood; affect strictly defined cells, tissues, organs; act in very small quantities and regulate the metabolism, growth, development of the body and the work of its organs.

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.