<unk>  are bones found in the limbs of most vertebrates. In humans, they are the bones at the base of a toe or finger, the prominent, knobby ends of which are often called the knuckles.
In other vertebrates,<unk>  have a similar placement in the corresponding limbs, be they paw, wing or fin. In many species, they are the longest and thickest phalanx ("finger" bone).
Proximal phalanges
Club foot
Metatarsophalangeal articulations
Hinge joint
Metatarsus
Head of radius
Fimbria 
Trigger finger