What is the name of the large bone in the upper arm?

The large bone in the upper arm is known as the humerus. It is a long bone that extends from the shoulder to the elbow, playing a crucial role in arm movement and supporting the muscles that control motion of the upper limb. The humerus articulates with the scapula at the shoulder joint and with the radius and ulna at the elbow joint, allowing for a wide range of movements including lifting and rotation. Understanding the anatomy of the humerus is fundamental in fields like anatomy, physical therapy, and sports medicine, as it is central to how the arm functions. The radius and ulna are the two bones located in the forearm, while the sternum is a flat bone located in the center of the chest, which further clarifies the unique role of the humerus in the arm's skeletal structure.