[Roddilla]

Why do we say that macrophages are part of the innate immune system if they still have to recognise the antigen with specific receptors like the T cells and B cells?

[Roddilla]

What is exactly the role of antibodies? I know they activate compliment proteins but am I correct to think that they make it easier got eosinophils, monocytes and neutrophils to phagocytose them?

[Wondergirl]

That's part of their adaptive immunity ability. They are very versatile little guys.

[Roddilla]

But why do we classify them as innate?

[Wondergirl]

Antibodies identify and neutralize foreign objects such as bacteria and viruses for the immune system.

[Wondergirl]

The immune system is innate.

From Wikipedia --

innate immune system = non-specific immune system, first line of defense, comprises the cells and mechanisms that defend the host from infection by other organisms in a non-specific manner. This means that the cells of the innate system recognize and respond to pathogens in a generic way, but unlike the adaptive immune system, it does not confer long-lasting or protective immunity to the host.