Immune system
from class: Pharmacology for Nurses Definition The immune system is a complex network of cells, tissues, and organs that work together to defend the body against harmful pathogens like bacteria, viruses, and fungi. It plays a crucial role in maintaining health by identifying and neutralizing foreign invaders.
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Predict what's on your test 5 Must Know Facts For Your Next Test The immune system can be divided into innate (nonspecific) immunity and adaptive (specific) immunity. Innate immunity includes physical barriers like skin and mucous membranes as well as immune cells such as macrophages and neutrophils. Adaptive immunity involves lymphocytes, including T-cells and B-cells, which provide targeted responses to specific pathogens. Vaccinations help the immune system recognize and fight specific infections by mimicking a natural infection. Autoimmune diseases occur when the immune system mistakenly attacks the body's own tissues. Review Questions What are the primary differences between innate and adaptive immunity? How do vaccinations contribute to the effectiveness of the immune system? What role do T-cells and B-cells play in adaptive immunity? "Immune system" also found in:
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