Lymphocytes

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.

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.

Review Questions

• What are the three main types of lymphocytes?
• How do T cells differ from B cells in their function within the immune response?
• What role do Natural Killer (NK) cells play in innate immunity?

Related terms

T Cells: Lymphocytes that mature in the thymus and participate mainly in cell-mediated immunity

B Cells: Lymphocytes responsible for producing antibodies as part of humoral immunity

Natural Killer Cells: A type of lymphocyte that can kill virus-infected or cancerous cells without prior activation