Many anatomical studies have classified the collar bones in humans within the bones of the shoulder extending from the top of the leg and connected to the ends of the head. The collar bones are defined as a thick, curved bone that connects the arm area, and is placed directly over the first rib of the shoulder  and it forms part of the shoulder bones Or what is known as the "thoracic belt" - and takes the form of a key that rotates around the axis of the bone, and in the case where the shoulder bone is receding from the trunk, specifically when one hand is coming and the other hand is excluded.
The location of the collar bone is clear, especially for some women who suffer from less fat, so that it forms a protrusion on the skin, and the function of the collar bones is that they are a link to the shoulder bones, in order to provide full flexibility for the arm so that it moves easily and easily, and these bones are centered as previously mentioned With the thoracic bones or what is known as the sternum fist through the connecting joint, which is called the sternoclavicular joint, with what is known as the scapular plate by the acromioclavicular joint, the clavicle is mainly composed of a round medial end and a flat gasket end  .
The collar bones in the so-called sternal, pyramidal, rough end are a path in the shape of the arch towards the lateral end, and from the back they extend about half the radius, and then another arc in the congenital smooth form centered around the shoulder, and such flat, lateral ends have a dense lower surface that is thicker than the end The sternum consists of visible lines and protrusions, and these prominent areas form the places of connection of the ligaments, joints and bones of the shoulder. 
Functions of the collar bones
The functions of the collar bones are proportional to their structure, shape, and location between the bones of the shoulder and the torso, as represented in the following: 
- It gives the shoulder a distinctive shape and makes it more rigid, and consequently, these two characteristics give the bones of the upper arm greater flexibility by separating them from the bones of the chest, so that they can move more smoothly and easily.
- The area between the neck and the arm, which is called the axillary canal, surrounds the axillary canal, which acts as a link with many important passages and structures in the human body.
- A vector medium for internal physical stresses and indicators from the upper limb of the proximal axial skeleton; This is in order not to be too burdensome on the upper extremity.
- Note: It is worth noting that the collar bones, although they are long bones, do not contain a core like the rest of the long bones of the body, and the wishbone consists of a spongy bone surrounded by a crust and a human bone that resembles the skull bone in its structure. 
- Jason Allen Lowe (4-3-2016), "Clavicle Fracture (Broken Collarbone)" , OrthoInfo , Retrieved 4-6-2018. Edited.
- Dr. Chris, "Clavicle (Human Collarbone) Anatomy, Parts, Location and Functions" , healthhype , Retrieved 4-6-2018. Edited.
- Anne Elisabeth Ljunggren (8-7-2009), "Clavicular Function" , Acta Orthopaedica , Page 261-268. Edited.