How white blood cell defend us from infections?

The white blood cell, also known as the leukocyte or white corpuscle, is a cellular component of the blood that lacks haemoglobin, has a nucleus, is motile, and protects the body from infection and disease by ingesting foreign materials and cellular debris, destroying infectious agents and cancer cells, or producing antibodies. White blood cells' existence as living cells is dependent on their ability to produce energy on a continuous basis. Chemical pathways used are more sophisticated than tho...