The ulna.
You could sort of say that because the humerous is the arm bone and phalanges are your fingers so it sort of works out that way
femur ulna radius tibia fibula humerous
your elbow is a joint, it is connected to your Humerus, Radius and Unla
The carpal bones are connected to the radius bone through the radiocarpal joint, which is a synovial joint that allows for movement of the wrist. The radius bone articulates with the scaphoid and lunate carpal bones at the wrist.
There are three types of bones within the arm. The large bone is the humerus and is in the upper part of the arm. The radius is part of the forearm and are smaller bones. The ulna is another part of a bone in the forearm.
There are several, the main one being the biceps brachii.
Radius and Ulna all in the arm
The humerous is the upper arm bone. Its primary function is to support the arm muscles and allow the arm to move.
The humerus (upper arm bone) is closer to the body than the ulna and the radius (lower arm bones) and so it is proximal. See link below: Table #3
There are two bones in the forearm, the radius and the ulna. The easiest way to remember which one is which is to extend your arm out palm facing vertically. When you look at your forearm your radius is the top bone and the Ulna is the lower bone.Or (as I did) remember it with this sentence: "The Ulna is Underneath."
The humerus.
There is no "whole arm bone". There are three major bones that are considered the "arm": the humerus, the ulna, and the radius. The former is in the upper arm while the other two are in the forearm.