Which bone is located in the forearm on the same side as the little finger?

The ulna is the bone located in the forearm on the same side as the little finger. In the anatomical position, which is how the body is typically referenced in educational contexts, the arms are at the sides with palms facing forward. In this orientation, the ulna runs parallel to the radius but is positioned on the side closest to the little finger, while the radius is on the opposite side, closest to the thumb.

The ulna serves as a key structural component of the forearm, contributing to the elbow joint and supporting various movements. Its alignment with the little finger makes it significant in hand function, particularly in movements that involve grasping or wrist rotation. Understanding the positioning of these bones is essential for students studying anatomy or performing practical applications related to nail care, as it highlights the relationship between bone structure and hand function.

The other choices don't relate to the forearm's anatomy accurately. The humerus is the upper arm bone connecting the shoulder to the forearm bones, while the sternum is a bone in the chest. Neither of these is found in the forearm or positioned with respect to the little finger.