Radius (bone) ulna (center of the circle) to the edge of the radius (the circle). The ulna acts as the center point to the circle because when the arm is rotated the ulna does not move. In four-legged animals, the radius is the main load-bearing bone of the lower forelimb. Its structure is similar in most terrestrial tetrapods, but it may be fused with the ulna in some mammals (such as horses) and reduced or modified in animals with flippers or vestigial forelimbs. Radius (bone) The radius or radial bone is one of the two large bones of the forearm, the other
Forearm (comics) "the boy". Forearm was also featured in a "What If" issue that asks "What If Magneto Took Over the USA." He is shown as a member of the MLF. In this storyline, Magneto killed Stryfe and coerced the remaining members of MLF to follow him. Forearm was also killed during this reality in an explosion. Forearm (comics) Forearm (Michael McCain) is a fictional mutant villain appearing in American comic books published by Marvel Comics. As a member of the Mutant Liberation Front, Forearm has always been a mainstay on the terrorist group's roster, even staying through leader changes and incarceration.