The main function of white blood cells in the body is to A)carry oxygen B)help in clot formation C)produce more red cells D) protect body against diseases
Option D) White blood cells, or leukocytes are cells of the immune system involved in defending the body against both infectious disease and foreign materials. They are produced and derived from a multipotent cell in the bone marrow known as a hematopoietic stem cell. They live for about three to four days in the average human body. Leukocytes are found throughout the body, including the blood and lymphatic system.
