The pectoral girdle, also known as the shoulder girdle, is a bony structure that connects the upper limbs to the axial skeleton. It consists of two main components: the clavicle (collarbone) and the scapula (shoulder blade). This girdle provides support and stability for the arms while allowing a wide range of motion. The pectoral girdle plays a crucial role in various activities, such as lifting, throwing, and reaching. It helps anchor muscles that control arm movement, including those in the chest and back. Overall, the pectoral girdle is essential for upper body mobility and strength.