What portion of the muscle is attached to another muscle or joint (farthest away)?

The insertion of a muscle is defined as the part of the muscle that is attached to another muscle or to a joint, and it is typically located farthest from the muscle's origin. The insertion point plays a crucial role in the functioning of muscles, as it is where movement occurs in relation to the muscle's contraction. When a muscle contracts, it pulls on the insertion point, causing movement around the joint.

Understanding the relationship between origin and insertion is important in the context of muscle function. The origin is the stationary attachment point, while the insertion allows for movement. Hence, knowing that the insertion is the portion of the muscle responsible for attaching to other structures helps clarify the mechanics of how muscles function during physical activities.