The Clock of Ages: Why We Age, How We Age, Winding Back the ClockPaperback
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- Publisher: CAMBRIDGE UNIVERSITY PRESS
- Format: Paperback | 348 pages
- Dimensions: 154mm x 228mm x 21mm | 549g
- Publication date: 1 October 1997
- Publication City/Country: Cambridge
- ISBN 10: 0521594561
- ISBN 13: 9780521594561
- Edition statement: Revised ed.
- Illustrations note: 64 b/w illus.
- Sales rank: 1,179,201
Anyone who has watched a wrinkle slowly gouge their face like a strip mine, or has been disturbed by a loss of memory, has uncomfortably confronted the human ageing process. The inexorable march of time on our bodies begs an important question: why do we have to grow old? Written in everyday language, The Clock of Ages takes us on a tour of the ageing human body - all from a research scientist's point of view. From the deliberate creation of organisms that live three times their natural span to the isolation of human genes that may allow us to do the same, The Clock of Ages also examines the latest discoveries in geriatric genetics. Sprinkled throughout the pages are descriptions of the aging of many historical figures, such as Florence Nightingale, Jane Austen, Bonaparte and Casanova. These stories underscore the common bond that unites us all: they aged, even as we do. The Clock of Ages tells you why.
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'This is simply a fantastic book ... the best biology book written for the lay public for many years.' Eric D. Albright, Library Journal '... a tour around the ageing human body, conducted with elegance and verve.' Susan Aldridge, Focus 'A tour of human ageing that aims to educate and entertain.' Nature 'An entertaining and edifying book with a cast of characters ...'. Roy Herbert, New Scientist '... an enjoyable as well as very informative book'. T. Franklin Williams, Journal of Urban Health '... this fascinating book takes us on a comprehensive tour of our ageing bodies, inside and out ... Clearly illustrated and very readable, the book approaches what is often a taboo subject with both humor and humanity.' The Good Book Guide
Aging is a universal human experience, yet even now a poorly understood one; Medina's book is an accessible summary of what we know. Medina (Bioengineering/Univ. of Washington) begins with a brief description of his own mother's life and last days, which inspired him to investigate the aging process. The text then turns to a discussion of the biological meaning of aging and death. A key point is that death is not the simultaneous failure of an entire organism; it is the failure of some key component, such as the heart or lungs, that brings about the end. Medina thus devotes the middle portion of the book to an examination of how each system of the body changes with age. The skin wrinkles, the bones weaken, the lungs lose their capacity to oxygenate blood. But the processes do not proceed at the same pace; half the nerve cells in the occipital cortex will die before a human reaches old age, but almost all those in the thalamus will survive. Vision and hearing deteriorate, but taste buds actually regenerate. Each chapter is introduced with a brief biography of a person whose death in some way illuminates the system under discussion and adds human interest: Goya for the brain, Elizabeth Barrett Browning for the heart, Casanova for the reproductive system. Finally, Medina looks at aging from the biochemical perspective. One theory suggests that aging is a result of cumulative errors in the reproduction of an organism's cells; another, that it is programmed into the genes and promoted by toxic waste products of metabolism. (There is good evidence for both.) Finally, strategies to combat aging are discussed: exercise, a moderated diet, the replacement of certain hormones that decrease with age. While no one has discovered a way to prevent aging and death, Medina ably brings together what we know about these inevitable processes and provides insight into possible avenues of future research. (Kirkus Reviews)
Table of contents
Preface; Introduction; Part I. Who Ages?; Introduction; 1. A slippery overarching definition; 2. Humanizing ageing and death; 3. Why age at all?; Part II. How Do We Age?; Introduction; 4. How the skin and hair age; 5. The ageing of bones, muscles and joints; 6. The ageing of the brain; 7. How the heart ages; 8. The ageing of the lungs; 9. What happens to the digestion; 10. How the senses age; 11. The ageing of the reproductive system; Part III. Why Do We Age?; Introduction; 12. A tale of two theories; 13. Error accumulation; 14. Programmed death; 15. Winding back the clock; Conclusions; Further reading; Index.