Immune System

**Semantic type:** Body System

**Definition:** The complex group of organs like thymus, spleen, tonsils, lymphatic system, hematopoetic system and cells like lymphocytes, granulocytes, monocytes and macrophages that defends the body against infection or disease. It consists of a complex interrelated cellular, molecular and genetic component.

**Synonyms:** - allergic/immunologic body system - allergic/immunologic organ system - body system, allergic/immunologic - immune system - immune system - immunologic/allergic organ system - organ system, allergic/immunologic