The Immune System P A R T A 1. Immunity: Two Intrinsic Defense Systems Innate (nonspecific) system responds quickly and consists of: First line of defense.
Copyright © 2010 Pearson Education, Inc. Immune System: Functions Protects against pathogens Bacteria Viruses Parasites Protects against foreign molecules.
The Immune System
Copyright © 2010 Pearson Education, Inc. Immune System: Overview The immune system has three types of components Lymphoid tissues Various types of immune.
Mechanism of Phagocytosis Figure 21.1a, b Natural Killer (NK) Cells Cells that can lyse and kill cancer cells and virus- infected cells Cells that can.
Immune System: Overview
