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Sesamoid bone

In anatomy, a sesamoid bone is a bone embedded within a tendon.

Examples in human anatomy include:

The patella[?], a bone at the front of the knee.
The sesamoid bones of the first metatarsal[?] of the foot. This area is beneath the pad on the foot just proximal to the big toe[?]. These two bones serve to protect the tendon that flexes the toe, by protecting it from the body's weight.
The pisiform, a carpal bone of the hand.

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