PSI Barbering Practice Exam 2026 – All-in-One Resource to Master Your Certification!

The largest bone of the arm, which extends from the shoulder to the elbow, is the humerus. This long bone plays a crucial role in the structure and function of the upper limb. The humerus connects at the shoulder with the scapula (shoulder blade) and at the elbow with the radius and ulna (the two forearm bones).

Its length and strength allow it to support a significant range of motion in the arm, which is vital for various movements and tasks, from lifting to throwing. The humerus is involved in many joints and muscle connections, making it integral to the upper body's functionality. Understanding the roles and connections of the humerus is essential for grasping how the skeletal system supports movement and coordination in the human body.