What biologically active substances are formed in the endocrine glands of a person?

Hormones are biologically active substances that are formed in the endocrine glands, enter the bloodstream and have a regulatory effect on the functions of organs and systems of the body.

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.