The smallest white blood cell (WBC) is the T-lymphocyte.
T-lymphocytes, a type of lymphocyte, measure approximately 5-7 micrometers in diameter. Multiple sources confirm this as the smallest among the different types of white blood cells.
Understanding White Blood Cells (WBCs)
White blood cells, also known as leukocytes, are a crucial part of the body's immune system. They come in various types, each with a specific role in fighting infection and disease. These types include:
- Neutrophils: These are the most abundant type of WBC.
- Lymphocytes: This category includes T cells (like T-lymphocytes) and B cells.
- Monocytes: These are the largest WBCs.
- Eosinophils: Involved in allergic reactions and parasitic infections.
- Basophils: Release histamine and heparin during allergic reactions.
While the size of WBCs can vary slightly depending on individual factors and the specific subtype, T-lymphocytes consistently rank as the smallest. The provided references support this conclusion, stating that their size is approximately 5-7 micrometers in diameter, making them the smallest among white blood cells.
