The biopsychosocial model is the way to explicate health and illness   through biological , psychological and social factor , represent by American Psychiatrist Gorge Engel. He said that "To provide a basis for understanding the determinants of disease and arriving at a rational treatments and patterns of health care, a medical model must also take into account the patient, the social context in which he lives and the complementary system devised by society to deal with the disruptive effects of illness, that is, the physician role and the health care system. This requires a biopsychosocial model." However, the biopsychosocial model, in contrast to the medical model, conceptualizes disease as a multilevel phenomenon.   It rejects the reductionistic bias of the medical model. To embrace reductionism means important data will be excluded.

Engel has develop this model ,He knows that the essential of   this model provide a basis for the understanding and treatment of disease, while taking into account the patient, his or her social context and the impact of illness on that individual from a societal perspective .The biopsychosocial model indicates a health care concept that have involve with current   pain theory. It has sought coexistence with the dominant biomedical model of health care ,which can describe ‘disase’ that result from infection , injury or inheritance. The model is base on between mind and body.  

The relative roles of biological, psychological, or social factors also may vary across individuals and across stages of the life span. It can explain how all these factors work together. So, the biopsychosocial factors of depression for one person could be the combination of genetics and neurotransmitter levels, negative thoughts, and an abusive family environment.
The biological aspect of the biopsychosocial model refers to the physiological of body. It also refers to genetic traits, and the brain functioning that we "inherit." More specifically, what...