The human body is made up of more than 100 thousand billion cells, each bearing instructions for the development of the entire body. The cells act as tiny components of the body's tissues and organs, which together make up a marvellously synchronized, integrated whole. This detailed book is an inspiring aid to understanding this complex living machine. With such a wealth of illustration, never before has it been possible to learn so much, so quickly, about the human body, both female and male, in sickness and in health, and from birth to old age.