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3. Immune System

The immune system depends on protein to mount a defense against pathogens and maintain the barriers that keep pathogens and harmful substances out of the body. Specialized white blood cells called B lymphocytes circulate in the bloodstream and produce antibodies, proteins essential for fighting off viruses or bacteria. The complement system within the immune system uses proteins on cell membranes to guide various types of white blood cells wherever they are needed to fight infection.

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This site offers information designed for educational purposes only. You should not rely on any information on this site as a substitute for professional medical advice, diagnosis, treatment, or as a substitute for, professional counseling care, advice, diagnosis, or treatment. If you have any concerns or questions about your health, you should always consult with a physician or other healthcare professional.