Which two bones comprise the forearm?

The forearm is comprised of two long bones: the radius and the ulna. These bones run parallel to each other from the elbow to the wrist and play crucial roles in the function and movement of the arm. The radius is located on the lateral side of the forearm (thumb side), whereas the ulna is situated on the medial side (pinky side). Together, they allow for a range of motions such as pronation and supination, enabling actions like turning the palm up or down.

In contrast, the other options include bones that do not belong to the forearm. The tibia and fibula are the bones of the lower leg, the scapula and clavicle are part of the shoulder girdle, and the humerus is the upper arm bone, with the acromion being part of the scapula. Understanding the specific roles and locations of these bones is important for recognizing their functions in the skeletal system.