Body System is important in face of the entire construction of curricular matrices in health based on the disease and only in the basic cycle focus on the physiology of the systems. Based on the World Health Organization (WHO), described in 1946, the definition of health is not only health as a state of complete physical, mental and social well-being, and exclusion of diseases, but also involves multidimensional aspects. The perception of the concept of quality of life is subjective and variable with each individual and experience. From this scenario, it becomes essential to know the human physiology to better diagnose, treat and rehabilitate diseases.This work portrays the body system and the functioning of organic reactions and balance.