Sesamoid bone

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.