3 on each upper arm
The Upper Arm is made of one bone, the Humerus. There are therefore 2 Humerus bones in any mammalian skeleton.
Technically 1 asthe arm is only the region of the upper limb that is between the sholder and elbow joint. That 1 is called the humerus. In the whole of the upper exretmist there are 30, humerus,...
The upper arm of any mammal is made of one bone, the Humerus.
There is only one bone in the upper arm - the humerus.