Fill in the Blank QuestionFill in the blank question.The blood cells primarily function to protect the body against disease.

The blank in the statement can be filled with "white blood cells."

White blood cells, or leukocytes, play a crucial role in the immune system by defending the body against infections, pathogens, and foreign substances. They are produced in the bone marrow and are part of the body's secondary line of defense after the innate immune response. There are several types of white blood cells, including lymphocytes (which produce antibodies), neutrophils (which attack bacteria), and monocytes (which clean up dead cells). The balance and function of these cells are essential for maintaining health, and a low white blood cell count can make the body more susceptible to infections.