Healthcare and medicine

Heart Muscle Contraction

  1. Three Types of Muscle
  2. Heart Cells Up Close!
  3. Myosin and Actin
  4. Tropomyosin and troponin and their role in regulating muscle contraction
  5. Calcium Puts Myosin to Work
  6. Sympathetic Nerves Affect Myosin Activity
  7. Why Doesn't the Heart Rip?

Heart Cells Up Close! Get a close-up view of the cardiac cells and see what makes them different from the other (skeletal and smooth) muscle cells. Rishi is a pediatric infectious disease physician and works at Khan Academy.

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Heart Cells Up Close!

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