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Replaceable You: Skin Grafts, Bioprinting Organs, and the Science of Replacement Anatomy. Mary Roach discusses how third-degree burns destroy regenerative cells, causing severe disfigurement unless patched with allografts (temporary substitutes like cadaver or cod skin). Researchers are attempting to 3D print organs, currently in the "Wright Brothers stage," using specialized bio-ink and support gel. Xenotransplantation involves genetically editing pigs to grow human organs (chimerism) that the body would accept without rejection.
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