There is no single bone that forms the arm. There's a whole lot of them, especially if you include the hand as part of the arm.
The Humerus.
The humerus is a single bone. It is the only bone in the upper arm and one of the largest bones in the body.
The common name for the ulna bone is the "elbow bone."
It depends what you are using as a proportion. It is long compared to a single vertebrae but short in comparison to the entire spine.
the bone at the top of arm is humerus
The humerous is a single large bone that extends from the elbow to the shoulder. It is sometimes called the 'funny bone' , because when struck in a certain way you can have a 'funny' nerve tingling sensation. Humour/ funny.
Actually it is usually stronger. The bony callus that forms after healing is thicker at that point although remodeling will continue to take place.
The humerus is informally referred to as the upper-arm bone.
the humorous is your upper arm bone.
The long bone in the upper arm is called the humerus.
an arm bone
The bone at the top of the arm is called the humerus. It is the long bone that runs from the shoulder to the elbow.