The first anatomical examinations, nowadays part of the history of medicine, highlighted the importance of the heart and the blood vessels. As far as physiology is concerned, the cardiovascular system plays a more crucial role than all the other body systems, since it is not only responsible for its own nutrition but also for that of the rest of the tissues.
In unicellular organisms, simple diffusion of substances is sufficient to maintain the dynamic balance that enables life. However, more complex structures such as multicellular organisms would be unthinkable without a system of oxygen and nutrient distribution.
Given the critical role of the cardiovascular system, it is easy to understand that anything that interferes with its good health will have an impact on other organs and systems.
In Western countries, the leading cause of death is associated with different conditions that adversely affect the normal functioning of the cardiovascular system; for example, the high prevalence of atherosclerosis interferes with blood flow and often affects the performance of the heart muscle.
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