1

Second metacarpal/metatarsal bone
2

Third metacarpal/metatarsal bone
5

Third metacarpal bone: sagittal ridge
7

Proximal sesamoid: lateral
8

Proximal sesamoid: medial
9

Proximal sesamoid: apex
10

Proximal sesamoid: base
11

Proximal sesamoid: abaxial surface
13

Proximal phalanx (P1)
4

Third metacarpal/metatarsal bone: condyle
7

Proximal sesamoid: lateral
8

Proximal sesamoid: medial
8

Proximal sesamoid: medial
9

Proximal sesamoid: apex
10

Proximal sesamoid: base
11

Proximal sesamoid: abaxial surface
12

Proximal sesamoid: axial surface
32

Metacarpo(tarso)phalangeal
6
Fourth metacarpal/metatarsal bone
13

Proximal phalanx (P1)
14

Middle phalanx (P2)
16

Distal phalanx (P3): extensor process
20

Distal phalanx (P3): palmar/plantar process
22

Navicular bone
32

Metacarpo(tarso)phalangeal
15

Distal phalanx (P3)
17

Distal phalanx (P3): solar margin
19

Distal phalanx (P3): vascular channel
21

Distal phalanx (P3): crena
18

Distal phalanx (P3): solar canal