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system is the body's natural defense system that helps fight infections. The
organs of the immune system include:
The tonsils, which are on either side of the throat at the back
of the throat. The tonsils help make antibodies that fight
Lymph nodes and lymphatics, which are found throughout
the body. The lymphatics carry fluid, nutrients, and waste material between the
body tissues and the bloodstream. The lymph nodes filter lymph fluid as it
flows through them, trapping bacteria, viruses, and other foreign substances,
which are then destroyed by special white blood cells called
Thymus gland, which is found in the upper chest at the
bottom of the neck, behind the breastbone. The thymus helps make antibodies
that fight infection.
Bone marrow, which is found mainly inside the
long bones, vertebrae, and pelvic bones of the body. The marrow makes white
blood cells that destroy bacteria, viruses, and other organisms that cause
Spleen, which is found in the upper left side of the
abdomen. The spleen supports the immune system by helping it to recognize
bacteria and other foreign substances and destroying them.
E. Gregory Thompson, MD - Internal Medicine
W. David Colby IV, MSc, MD, FRCPC - Infectious Disease
E. Gregory Thompson, MD - Internal Medicine & W. David Colby IV, MSc, MD, FRCPC - Infectious Disease
How this information was developed to help you make better health decisions.