What is the major function of white blood cells?
[Answer: White blood cells (called leukocytes) are our immune cells. Our immune system is made up of white cells that protect us from diseases. Some of the main cells in our immune system are The macrophage : Macro = Big, Phage = Eater. The Big Eater. This cell eats the invaders or germs (called antigens) and sends a signal to the captain of our immune system that an invader is present and that the immune system army needs to respond. The T4 Helper Cell (CD4) : Captain of our immune system. It receives the message from the macrophage when an invader (antigen) is present and orders two more cells (the B cell and the T8 killer cell) to search for, and destroy, the invader. The T4 Helper Cell is also the cell that HIV attacks and destroys. T cells are called “T” because they mature in the thymus gland. The B Cell : Like a factory. It identifies the shape of the invader (antigen) and makes antibodies (like keys), which fit the antigen. These antibodies can immediately recognize future anti
