INTEGRATION, a physiological term, designating the various processes by which the multifarious activities and func tions of the organism are knit together to produce a unified individual. The nervous system (q.v.) is by far the most im portant integrative mechanism. By nerve impulses, organs or tissues in one part of the organism are able to exert a co-operative influence on other distant bodily parts. The nerve impulses, in turn, are themselves integrated into harmoniously functioning patterns by action of their common synapses in the central nervous system. Hormones (q.v. and see also ENDOCRINOLOGY) are also very important in correlating bodily activities. For integration in mathematics see QUADRATURE.