The internal environment of the human body includes blood, lymph and interstitial fluid, which is located in the intercellular space. The nervous system and the system of endocrine glands play a very important role in it. The internal environment is characterized by many parameters and constants. Almost any human activity is accompanied by a change in the parameters of the internal environment. The body’s ability to maintain a constant level or within specified limits the state of the internal environment is very large, but far from unlimited. If the negative impact of the external environment is strong enough or long enough, it violates the normal state of the internal environment of the body and leads to the development of the disease. Normalization of the state of the internal environment is achieved by the inclusion of special compensatory (adaptive) mechanisms in the body. Thanks to them, the body reorganizes its activities and adapts to the constantly changing environmental conditions.
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.