1. Any kind of organized structure within society that contributes so society (e.g. education system).
2. An organized set of interrelated and inter-active parts which has a definite purpose. The human body can be viewed as a system in that it is a set of elements that works together, responding to changes in the environment (see also homeostasis).
3. In biomechanics, a mechanical system chosen for study. The system may be the entire human body a part of the body a projectile or some other object.
