What are the origin and insertion of muscles?

Answer:
The origin and insertion are the two points of muscle attachment. The origin is the immovable (or slightly movable) point and the insertion is the moveable end. When a muscle moves, the insertion point always moves towards the origin.
First answer by Amaroque. Last edit by Amaroque. Contributor trust: 105 [recommend contributor recommended]. Question popularity: 1 [recommend question].