Replaceable You

Adventures in Human Anatomy

By: Mary Roach

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Hardcover | 2 October 2025

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Hardcover

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22.4 x 14.5 x 2.8

Hardcover

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Our bodies regenerate at a remarkable rate â" our skin replaces itself every month, our blood every four. You can remove ninety per cent of a liver and itâll still grow back to its original size (please do not try this at home). Others â" the brain, the heart, the eyes â" are more complicated. These stay with us for life. So what do we do when they break down? For centuries, medicine has searched for answers â" sculpting noses from brass, borrowing skin from frogs and hearts from pigs and crafting eye parts from jet canopies. And as technology has grown ever more ingenious, so have our solutions. In Replaceable You, Mary Roach sets sail on the uncharted waters of regenerative medicine, exploring the remarkable advances and difficult questions prompted by the human bodyâs failings. When and how does a person decide theyâd be better off with a prosthetic than their existing limb? Is there a sensitive way to harvest tissue and bones from the deceased? Which animals might be the best organ donors? Through interviews with patients, physicians, pathologists, engineers and scientists, Roach immerses readers in the wondrous, improbable and surreal quest to build a new you.

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