Contraction During Contraction

Most of our skeletal muscles are attached to bone on either end by tendons. As the muscles contract, they exert force on the bones. This force helps to support and move our body. Normally one end of the muscle is fixed in its position and the other end moves during contraction. The Origin is the attachment site that is stationary during contraction. The insertion is the site that does move when a muscle contracts. When we discuss the position of the Origin and insertion points, the insertion is usually distal, or further away. While the origin is proximal, or closer to the body, relative to the insertion.
Part #2: The Femur, also called the thigh bone, is the largest bone in the body. It is the heaviest, the longest and strongest