Meaning of IMMUNE SYSTEM

WordNet Dictionary
	Definition:		[n]  a system (including the thymus and bone marrow and lymphoid tissues) that protects the body from foreign substances and pathogenic organisms by producing the immune response
	See Also:		bone marrow, lymph gland, lymph node, marrow, node, RES, reticuloendothelial system, system, thymus, thymus gland
Medical Dictionary
	Definition:		complex network of specialized cells and organs that work together to defend the body against attacks by "foreign" invaders such as bacteria and viruses.
Biology Dictionary
	Definition:		The cells and tissues which are responsible for recognizing and attacking foreign microbes and substances in the body.