Hormones

All life proceeds under the guidance of hormones, and if a person carefully studies the theory of evolution and evolution, he will find that the human body appeared as a result of the development of controlling the functions of the organs. This is most apparent in the nervous system, which increases in complexity as we move up in the animal kingdom. For example, in primitive animals that do not have a nervous system. Functions are carried out as a result of chemical secretions. In fact, many phenomena and actions in animals and humans are affected by hormonal secretions, and many physiological and natural problems depend on the relationship between different hormones.Hormones affect personal character. A deficiency and increase in the secretion of the thyroid gland leads to laziness, and its secretion may lead to staying up late and being constantly active. The lack of female hormones in nurse Florence Nightingale made her do men''s work and stay up late in serving and nursing them during the World War.