Overview of The Lymphatic System and Immunity
The immune system is composed of the responses by which the body neutralizes foreign agents, whether living or nonliving, as well protects against its own cells which may be cancerous. These responses fall into two general categories. General protective mechanisms which function without prior exposure to harmful agents are classified as nonspecific defense mechanisms. Acquired immunity consists of specific immune responses directed against specific agents. Acquired immunity depends on the lymphatic system, a network of lymphatic vessels that carry a clear fluid called lymph containing lymphocytes and other white blood cells.
The Lymphatic System and Immunity on the MCAT