immune disorders
Acquired Immunity
Introduction
One of the body's lines of defense ( Overview of the Immune System ) involves This defense has two parts: Innate Immunity None Acquired immunity Acquired (adaptive or specific) immunity is not present at birth. It is learned. The learning process starts when a person’s immune system encounters foreign invaders and recognizes nonself substances (antigens). Then, the components of acquired immunity learn the best way to attack each antigen and begin to develop a memory for that antigen. Acquired immunity is also called specific immunity because it tailors its attack to a specific antigen previously encountered. Its hallmarks are its ability to learn, adapt, and remember. Acquired immunity takes time to develop after first exposure to a new antigen. However afterward, the antigen is remembered, and subsequent responses to that antigen are quicker and more effective than those that occurred after the first exposure. The white blood cells responsible for acquired immunity are Lymphocytes (T cells and B cells) Other participants in acquired immunity are Dendritic Cells None Cytokines None The Complement System (which enhances the effectiveness of antibodies) 