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What is the arm bone called?

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The humerus is the only bone of the upper arm. It is a long, large bone that extends from the scapula of the shoulder to the ulna and radius of the lower arm. The proximal end of the humerus, known as the head, is a round structure that forms the ball of the ball-and-socket shoulder joint. read more

According to the BBC Science and Nature, the human arm consists of three long bones, known as the humerus, in the upper arm, and the ulna and the radius in the lower arm. Of these, the humerus is the thickest. read more

Coccygeal vertebrae (set of 5 bones at birth; some or all fuse together, but there seems to be a disagreement between researchers as to what the most common number should be. Some say the most common is 1, others say 2 or 3, with 4 being the least likely. read more

There are three, the humerus which is the upper bone from the shoulder to the elbow, then there are two bones between the elbow and wrist called the radius and ulna. When you extent you arm to shake hands with someone, the radius is the bone on top. read more

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