A view or theory that is in contrast to vitalism q.v. and states that life can be explained in terms of natural transformations of energy and matter, without the introduction of any immaterial or extranatural vital forces.
A physical or chemical change by which a function is carried out.
A system in the body which carries out or controls a particular function.
Process that occurs during a reaction, injury, or development of disease. In trauma, the mechanism of injury refers to items such as where a car was hit, whether the driver was restrained, if the driver hit the windshield.