White blood cells

**White Blood Cells**

White blood cells (WBCs), also known as leukocytes, are a vital component of the immune system. They play a crucial role in defending the body against infections, foreign invaders, and abnormal cells. These cells are produced in the bone marrow and circulate through the bloodstream and lymphatic system. There are several types of white blood cells, including neutrophils, lymphocytes, monocytes, eosinophils, and basophils, each with unique functions in immune response. Understanding white blood cells is essential in fields like medicine, biology, and health care, as their levels and activity can indicate various health conditions.