Infection and Inflammation

Your immune system responds quickly when your body is threatened by potentially dangerous foreign invaders, such as bacteria and viruses. In this investigation, you are provided with three scenarios. For each scenario you will identify and select the cells that are involved with the body's defense systems and watch animations that illustrate how the cells work together to fight against foreigner invaders. Click on the more info button for background information about the different types of cells that help your body respond to foreign invaders (pathogens) and allergens.