Immune Response

Definition

The immune response is the body's natural defense mechanism against harmful pathogens like bacteria, viruses, and other foreign invaders. It involves recognizing these invaders and launching a defense to protect the body.

Scientific / Technical Definition

The immune response consists of a complex network of cells, tissues, and organs that work together to defend the body against foreign substances. It includes both innate (non-specific) and adaptive (specific) defenses. The innate immune system serves as the first line of defense, while the adaptive immune system provides a targeted response to specific pathogens through the creation of memory cells.

Benefits

• Protects the body from infections and diseases.
• Helps to identify and neutralize harmful substances and pathogens.
• Maintains homeostasis by recognizing and removing diseased cells.

Examples

• Activation of white blood cells when you get a flu vaccine.
• Inflammatory response after a scrape or cut on the skin.
• Natural killer cells attacking a virus-infected cell.

Additional Information

• Importance: The immune response is crucial for survival, preventing infections, and maintaining health. It also plays a role in wound healing and recovery from illness.

Related Terms

• Inflammation
• Antibodies
• White Blood Cells
• Pathogens
• Adaptive Immunity

References

• Immune System Overview - National Institute of Allergy and Infectious Diseases
• How the Immune System Works - Harvard Health