1
Ability of the body to resist many agents (both living and nonliving) that can cause disease; resistance to disease
Immunity
2
The innate defense system has two lines of defenses
- First Line of Defense is the external body membranes, such as skin and mucosae
- Second Line of Defense relies on internal defenses such as antimicrobial proteins, phagocytes, and other cells to inhibit the invader's spread throughout the body
3
Provides the body with the third line of defense
Adaptive Defense System
4
A functional system rather than an organ system
Immunity System