Do you realize there are about 100 trillion cells in your body? That's a lot of cells to manage! It's a good thing they are organized into systems that all work together. This book takes you on a journey inside your body to see many types of cells'skin cells, blood cells, muscle cells, and more'magnified hundreds or thousands of times larger than their actual size. You'll find out how groups of cells work together to keep your body running. Are you ready for this microquest?Johnson, Rebecca L. is the author of 'Ultra-organized Cell Systems ', published 2007 under ISBN 9780822571384 and ISBN 0822571382.