What is the difference between sinew and tendon?
They get used somewhat interchangeably, which blurs the lines on the definitions.

When I had my anatomy classes, sinews were regarded as an inclusive class, which included both ligaments and tendons.

For the breakdown:


Tendon: Fibrous tissue that connects muscle to bone.
Ligament: Fibrous tissue that connects bone to bone.
Sinew: Includes both of the above.