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How Do Broken Bones Heal? How a Plaster Cast Helps
Find out what really heals a broken bone — spoiler: it's your own body, not the cast. Follow the repair from blood clot to soft callus to hard new bone, and learn why the cast's job is to hold everything still.
How it works
- Press play to start the video.
- Videos 5 minutes or longer pause once or twice for a quick check. Get it right and you're on your way. If not, you'll see a friendly explanation and the video simply keeps going. Short videos skip the checks.
- At the end there's a 3-question test. Score 60% or more to complete the lesson, and 80% or more to master it. You can always watch again and try for a higher score.