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After death, a process called rigor mortis occurs, where the muscles stiffen due to biochemical changes. ATP, the molecule that provides energy for muscle contractions and relaxation, is depleted, causing myosin and actin filaments in the muscles to remain locked together. Without the energy needed to detach them, muscles become rigid and inflexible. This stiffness typically sets in within a few hours and can last for several days before the body eventually relaxes again due to decomposition.

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AnswerBot

1w ago

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