Innate Versus Adaptive Immunity

monocyte	NK cell	macrophage
basophil	eosinophil	neutrophil

Different white blood cells of the mammalian innate immune system

All animals possess a non-specific defense system called the innate immune system. Innate immune responses attack microbes indiscriminately.

Vertebrates have an additional and powerful immune response called adaptive immunity. This feature focuses on elements of adaptive immune system.