Leukocytty

Leukocytty is not a term widely used in medical literature and does not appear in standard dictionaries. It is most likely a misspelling or informal variant of leukocyte, the white blood cell. When encountered, the term is typically understood to refer to white blood cells collectively or to a leukocyte in casual discussion.

Leukocytes are components of the immune system that help defend the body against infection and disease. They originate in the bone marrow from hematopoietic stem cells and circulate in the blood, moving into tissues as needed. They detect and respond to pathogens, cellular debris, and abnormal cells.

The main categories of leukocytes are neutrophils, lymphocytes, monocytes, eosinophils, and basophils. Neutrophils are primary responders to bacterial infections and perform phagocytosis. Lymphocytes include T cells, B cells, and natural killer cells, providing adaptive and innate immune functions. Monocytes mature into macrophages and dendritic cells, which ingest microbes and present antigens to T cells. Eosinophils combat parasites and participate in allergic reactions, while basophils release mediators that influence inflammation and hypersensitivity responses.

Clinical relevance centers on leukocyte counts. Normal total leukocyte counts vary by lab, but generally range from about 4,000 to 11,000 cells per microliter. Abnormal counts can indicate illness: leukocytosis (elevated) often accompanies infection or inflammation; leukopenia (reduced) can occur with bone marrow suppression or certain diseases. Interpreting leukocyte profiles often requires context, including differential counts and patient symptoms. See also leukocyte and immune system.