What is the meaning of trace elements

In the animal body, in addition to carbon, hydrogen, oxygen, nitrogen and other components of the organic matter, the rest of some metal and non-metallic elements called minerals. According to the amount of mineral content in the body is divided into two categories: macronutrients and trace elements. Minerals that account for less than 0.01% of body weight are called trace elements, such as manganese, selenium, iodine and zinc. Although the content of trace elements in the body is very small, but its physiological activities and growth and development of animals play an important role, if the trace elements are insufficient to cause metabolic disorders, growth and development stagnation, reduced production performance, resistance to disease and other reactions, serious can be directly caused by the group of morbidity and cause mass death. However, if you eat too much trace elements, it will also cause toxic reactions.