Say: ih-myoon sis-tum
This body system, which includes white blood cells and lymph nodes, helps protect your body from disease. The immune system has different parts, all of which work together to fight off outside invaders like germs. Every day your immune system does battle to keep you healthy and feeling your best.
Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor.
© 1995-2014 The Nemours Foundation/KidsHealth. All rights reserved.