In anatomy, a<unk>  () is a bone embedded within a tendon or a muscle. Its name is derived from the Arabic word for ("sesame seed"), indicating the small size of most<unk> s. Often, these bones form in response to strain, or can be present as a normal variant. The patella is the largest<unk>  in the body.<unk> s act like pulleys, providing a smooth surface for tendons to slide over, increasing the tendon's ability to transmit muscular forces.
Sesamoid bone
Pectus
Osteoid
Epiphyseal plate
Osteon
Favus
Metacarpal bones
Osteotome