Heart Muscle Contraction
Find out more about heart muscles and what happens when they contract.

Videos

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