ANATOMY

Detailed explanation-1: -A skeletal muscle attaches to bone (or sometimes other muscles or tissues) at two or more places. If the place is a bone that remains immobile for an action, the attachment is called an origin. If the place is on the bone that moves during the action, the attachment is called an insertion.

Detailed explanation-2: -The insertion of a muscle is defined as the place where one end of a muscle is attached to the freely moving bone of its joint.

Detailed explanation-3: -Origin – part of the muscle attached to the immovable or less movable bone. Insertion – part attached to the movable bone; insertion moves toward the origin.