Final answer:
The clavicular notch of the clavicle articulates with the manubrium at the sternoclavicular joint (SC), which allows for considerable shoulder mobility.
Step-by-step explanation:
The student is asking about the articulation point between the clavicle and the manubrium. The clavicular notch of the clavicle articulates with the manubrium at the sternoclavicular joint (SC), which is located medially at the chest and forms the only bony connection between the pectoral girdle of the upper limb and the axial skeleton. The clavicle, commonly known as the collarbone, has a medial (sternal) end that connects to the manubrium and a lateral (acromial) end that connects to the acromion of the scapula, forming the acromioclavicular joint. The sternoclavicular joint allows for considerable mobility of the shoulder, while the acromioclavicular joint facilitates the movement of the shoulder blade.