What Are Specific and Nonspecific Defenses

Nonspecific protective mechanisms repel all microorganisms equally, while the specific immune responses are tailored to particular types of invaders. Both systems work together to thwart organisms from entering and proliferating within the body.

Which type of defense is specific?

The immune system is the third line of defense. It consists of mechanisms and agents that target specific antigens (Ags).

What is a specific line of defense?

The first line of defense against infection are the surface barriers that prevent the entry of pathogens into the body. The second line of defense are the non-specific phagocytes and other internal mechanisms that comprise innate immunity.