whitecell
White cells, or white blood cells (WBCs), are a key component of the circulatory and immune systems. They are produced in the bone marrow from hematopoietic stem cells and circulate in the bloodstream and lymphatic system, migrating to tissues where they are needed. In contrast to red blood cells, white cells are nucleated and far fewer in number, but they mediate targeted defense against pathogens and damaged cells.
White blood cells are divided into two broad categories: granulocytes, which include neutrophils, eosinophils, and basophils;
White blood cell counts are a common clinical measure; normal adult ranges are typically about 4,000 to