immune system

(ih-MYOON SIS-tem) The complex group of organs and cells that defends the body against infections and other diseases.

(ih-MYOON SIS-tim): The complex group of organs and cells that defends the body against infections and other diseases.

The cells, tissues and organs that assist the body to resist infection and disease by producing antibodies and/or cells that inhibit the multiplication of the infectious agent.

An intricate system of cellular and chemical responses designed to protect the body from foreign substances and prevent recurrent illness by counteracting previous diseases through immunity. Bone marrow represents the body's primary producer of immune cells.