Which bones would you categorize as sesamoid bones?

Sesamoid bones are specialized bones that are embedded within tendons, and their primary function is to protect tendons from stress and wear. The patella, commonly known as the kneecap, is a prime example of a sesamoid bone. It develops within the quadriceps tendon and serves to enhance the leverage of the tendon and strengthen the extensor mechanism of the knee.

The other bones listed in the choices serve different purposes and do not fit the definition of sesamoid bones. For instance, the clavicle is categorized as a long bone, which connects the arm to the body and provides stability. Metacarpals are also long bones that form the intermediate part of the skeletal hand, and phalanges are the bones of the fingers and toes. None of these bones develop within tendons in the manner that sesamoid bones do. Thus, the patella stands out as the quintessential example of a sesamoid bone in this context.