This video contains an artist's representation of what bone looks like at the microscopic level. While many think that bone is simply a solid piece of calcium, it is actually a living, changing tissue with blood vessels and various small areas of open space.

This animated video not only shows a knee arthroscopy from start to finish, but gives a representation of what the surgeon sees through the tiny camera during arthroscopy. It also provides a view of the anatomy of the knee joint and how it works and moves.

The knee is a common site of pain in athletes because of the tremendous forces that it must endure. There are various parts to a knee such the tendon, bursa, and meniscus. Injury to these knee joint structures can cause pain.

This narrated 3D animation shows the anatomy of the knee joint and how a knee replacement (artificial knee placement) takes place. The movement of the artificial joint is shown.