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An iridescent illustration shows cells clustered together.
Figure 6.1 The immune system is a complex network of cells, tissues, and organs that work together to protect the body from harmful substances, such as pathogens. (attribution: Copyright Rice University, OpenStax, under CC BY 4.0 license)

The immune system is an intricate defense mechanism that protects the human body from diseases and infection. It uses antibodies and white blood cells to combat foreign invaders such as bacteria and viruses. Maintaining a healthy immune system is essential for overall well-being and resilience against potential harm. This section of the chapter will discuss the immune system and its function, explain antigen-antibody interactions, and compare antibody-mediated and cell-mediated immunity.

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© May 15, 2024 OpenStax. Textbook content produced by OpenStax is licensed under a Creative Commons Attribution License . The OpenStax name, OpenStax logo, OpenStax book covers, OpenStax CNX name, and OpenStax CNX logo are not subject to the Creative Commons license and may not be reproduced without the prior and express written consent of Rice University.