This anatomical meaning refers to the medial bone of the human forearm when the palm faces forward.
The fracture affected the ulna near the wrist.
The ulna forms a major part of the elbow joint.
This zoological meaning refers to the homologous bone in the forelimbs of mammals, birds, reptiles, and other vertebrates.
The bird's ulna supports several flight feathers.
Researchers measured the fossil ulna.
