Daring Cell Defenders

Bacteria and viruses are all around you. If they get inside your body, they can make you very sick. Fortunately, your body is built to keep illness-causing invaders out. If some do get in, special cells inside your body come to the rescue. They track down and destroy anything that might cause you harm. See how the daring cell defenders that make up your immune system keep you healthy. Are you ready for this microquest?Johnson, Rebecca L. is the author of 'Daring Cell Defenders ', published 2007 under ISBN 9780822571407 and ISBN 0822571404.