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The video discusses the heart's function as a vital muscle, highlighting its continuous operation. It introduces research from the University of Pennsylvania on microtubules, which provide mechanical resistance in heart cells. The video explains how microtubules interact with sarcomeres during heart contractions, affecting the heart's efficiency. Suppressing chemical changes in microtubules can enhance heart contractility, potentially benefiting patients with high blood pressure. The research aims to explore drugs that could strengthen diseased heart muscles.

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