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🔬general biology i review

Lymphocytes

Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025

Definition

Lymphocytes are a type of white blood cell crucial for the immune system. They play vital roles in both the innate and adaptive immune responses.

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5 Must Know Facts For Your Next Test

  1. Lymphocytes include T cells, B cells, and natural killer (NK) cells.
  2. T cells mature in the thymus and are essential for cell-mediated immunity.
  3. B cells produce antibodies and are key players in humoral immunity.
  4. Natural Killer (NK) cells can destroy virus-infected cells without prior sensitization.
  5. Lymphocytes circulate in the blood and lymphatic system to detect and respond to pathogens.

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