The clavicle is located between the acromion process and the sternum, with various muscles surrounding it. Surroundings influence its appearance, i.e., the visibility of the clavicle changes, depending on how trained the pectoralis major muscle is. Read more: https://anatomy4sculptors.com/article/shoulder-bony-landmarks/

Clavicle_-_animation2.gif (450×450)

Collar bones & those lipss