Which bone is the upper arm bone?

Which bone is the upper arm bone?

• A. Radius
• B. Scaphoid
• C. Humerus
• D. Ulna

Answer: (C)

The upper arm bone is the humerus. It runs from the shoulder to the elbow, forming the main bone of the upper limb and connecting with the shoulder blade at the top and with the forearm bones at the bottom. The radius and ulna are in the forearm, not the upper arm, with the radius on the thumb side and the ulna on the pinky side. The scaphoid is a carpal bone in the wrist. So the humerus is the correct bone for the upper arm.

The upper arm bone is the humerus. It runs from the shoulder to the elbow, forming the main bone of the upper limb and connecting with the shoulder blade at the top and with the forearm bones at the bottom. The radius and ulna are in the forearm, not the upper arm, with the radius on the thumb side and the ulna on the pinky side. The scaphoid is a carpal bone in the wrist. So the humerus is the correct bone for the upper arm.