The hormones of the endocrine glands circulate at different body organs to control growth and maturity, maintain the metabolic rate and adjust reactions, since the other part
is dedicated to the regulation of reproduction, this topic will not be included here. This section analyzes the regulation of growth and metabolic equilibrium, as well as drug pharmacology that regulate these processes. In the introduction, we have established the basic concepts of Endocrinology, focusing on the pituitary gland and its hormones of the peripheral endocrine organs of the target, followed by cells and reference systems. We also discuss the impact of Endocrinology in science and modern medicine based on evidence.