What are the Names of the Bones in an Arm?
The arm is composed of the humerus, radius, and ulna. The humerus is the long bone that extends from the shoulder to the elbow, while the radius and ulna are the two bones that make up the forearm.
Humerus
The humerus is the largest and longest bone in the arm. It has a rounded head at the top that fits into the glenoid cavity of the shoulder blade, and a trochlea and capitulum at the bottom that articulate with the radius and ulna.
Radius
The radius is the lateral bone of the forearm. It is shorter and thinner than the ulna, and has a rounded head at the top that articulates with the capitulum of the humerus. The distal end of the radius is flattened and forms part of the wrist joint.
Ulna
The ulna is the medial bone of the forearm. It is longer and thicker than the radius, and has a trochlear notch at the top that articulates with the trochlea of the humerus. The distal end of the ulna forms part of the wrist joint.
Related Questions
- What is the largest bone in the arm? The humerus
- Which bone is located on the lateral side of the forearm? The radius
- Which bone has a trochlea and capitulum? The humerus
- Which bone articulates with the glenoid cavity of the shoulder blade? The humerus
- Which bone is longer and thicker than the radius? The ulna
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