» Immune System
the body's natural defense against foreign substances and organisms that could lead to illness.

» Immunoglobulin
an antigen-binding protein secreted by specific white cells of the immune system. Immunoglobulins are antibodies.

» Inflammation
condition of some part of the body that is a reaction to injury, infection, irritation, etc., and characterized by varied combinations of redness, itchiness, pain, heat, swelling, and loss of function.