Bioscience:Human Defenses
Harmful microbes can enter our bodies via seemingly minor cuts or through contaminated food and water. Our bodies are well prepared to defend themselves against such exposures. The human body has many barriers to infection that we rely upon to protect us from harmful organisms. In this program， we shall explore the human immune system， which consists of a complex series of defense mechanisms that protect us from foreign invaders.
- Added：2006
- Country：America
- Duration：30
- Time of update：2011/8/18 15:42:35