RESPIRATORY PHYSIOLOGY, OXYGEN CIRCULATION AND ITS IMPORTANCE FOR THE ORGANISM, HYPOXIA

This article discusses the physiology of breathing as one of the main processes of human life. This process involves the intake of oxygen and the expulsion of carbon dioxide. It explores the connections not only with the respiratory process but also with the cardiovascular system, blood, and metabolic activities at the cellular level. The breathing process is controlled by the central nervous system, particularly the respiratory centres in the brain. These centres regulate the respiratory rate based on the concentration of oxygen and carbon dioxide in the blood. The classification of hypoxia aims to study the causes and mechanisms of its occurrence, by studying the respiratory and heart rate changes as a result of the body's increased demand for oxygen during physical activity.