fehérvérsejtekké

Fehérvérsejtek, also known as leukocytes, are a crucial component of the immune system in vertebrates. They are primarily produced in the bone marrow and are responsible for defending the body against infection and disease. Unlike red blood cells, which are confined to the bloodstream, white blood cells can circulate throughout the body, including in the lymph and tissues.

There are several different types of white blood cells, each with a specialized function. Lymphocytes, which include B cells and T cells, are central to the adaptive immune response. B cells produce antibodies, while T cells can directly attack infected cells or regulate the immune response. Granulocytes, such as neutrophils, eosinophils, and basophils, are involved in the innate immune system, engulfing and destroying pathogens or releasing inflammatory mediators. Monocytes differentiate into macrophages and dendritic cells in tissues, playing a role in both innate and adaptive immunity by engulfing cellular debris and pathogens and presenting antigens to lymphocytes.

The number of white blood cells in the blood can vary depending on a person's health status. An increase in white blood cells, known as leukocytosis, can indicate an infection or inflammation. Conversely, a decrease, called leukopenia, can result from certain medical conditions or treatments. The study and examination of white blood cells are essential in diagnosing and monitoring a wide range of diseases.