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

The ulna is the bone located on the side of the little finger in the forearm. It runs parallel to the radius, which is the bone on the thumb side of the forearm. The ulna is longer than the radius and is positioned medially in the anatomical position, meaning when a person is standing upright with palms facing forward, the ulna is on the inner side of the forearm closest to the little finger.

This positioning is significant for the functionality of the forearm, as the ulna plays a crucial role in forming the elbow joint and providing structural support to the forearm. Understanding the anatomy of the forearm and the relationship between these two bones is essential for nail technicians, as it may relate to the proper techniques for handling tools and performing nail care tasks effectively and safely.

In contrast, the other bones listed do not pertain to the forearm's anatomy in relation to the little finger. The humerus is the upper arm bone, and both the radius and the ulna are the bones of the forearm, yet only the ulna aligns with the little finger side. The femur, being the thigh bone, is not relevant in this context.