Prevalence, structure, and locations of<unk> s of the hand.<unk> s can be found on joints throughout the body, including: * In the knee—the patella (within the quadriceps tendon). This is the largest<unk> . * In the hand—two<unk> s are commonly found in the distal portions of the first metacarpal bone (within the tendons of adductor pollicis and flexor pollicis brevis). There is also commonly a<unk>  in distal portions of the second metacarpal bone. * In the wrist—The pisiform of the wrist is a<unk>  (within the tendon of flexor carpi ulnaris). It begins to ossify in children ages 9–12. * In the foot—the first metatarsal bone usually has two<unk> s at its connection to the big toe (both within the tendon of flexor hallucis brevis). One is found on the lateral side of the first metatarsal while the other is found on the medial side. In some people, only a single<unk>  is found on the first metatarsal bone.
Sesamoid bone
Pectus
Osteoid
Epiphyseal plate
Osteon
Favus
Metacarpal bones
Osteotome