hand 1a(1): bones of the human hand: a carpus, b metacarpus, c phalanges of thumb and fingers. Bones of the carpus: 1 lunate bone, 2 pisiform, 3 triquetral bone, 4 hamate, 5 capitate, 6 scaphoid, 7 trapezoid, 8 trapezium. Bones of the metacarpus: 9 to 13 first to fifth metacarpal bones, I thumb, II index finger, III middle finger, IV ring finger, V little finger. Phalanges: 14 first phalanx of thumb, 15 second phalanx of thumb, 16 ungual tuberosity, 17 first phalanx of index finger, 18 second phalanx of index finger, 19 third phalanx of index finger