Which bone is known as the inner and larger bone of the forearm located on the side of the little finger?

The ulna is recognized as the inner and larger bone of the forearm, specifically situated on the side of the little finger. In terms of anatomy, the ulna runs parallel to the radius, which is the smaller bone located on the thumb side of the forearm. When considering the structure of the forearm, the ulna plays a significant role in forming the elbow joint and serves as an important attachment point for muscles that allow movement of the arm and wrist.

Its positioning on the medial aspect of the forearm positions it closest to the little finger, which is a key characteristic that helps differentiate it from the radius. Unlike the radius, which is involved in the rotation of the forearm, the ulna primarily acts as a stabilizing structure. This distinction is fundamental in understanding the skeletal framework of the arm and its functionality.

The carpals refer to the wrist bones and are not related to the forearm bones directly, while the fibula is a bone of the lower leg, unrelated to the forearm structure. Thus, the ulna's size, position, and structural role clarify why it is the correct answer to the question posed.