Arms

The most mobile extremities of the body are the arms, which consist of several joints, muscles and bones that together enable both power and precision. The upper arm runs down from the shoulder to the elbow, where the humerus meets the two bones of the forearm – the radius and ulna. The wrist and hand are extremely mobile and have fine motor skills, which makes it possible to grasp, write, point and perform other complex movements.

The muscles of the arms are divided into flexors (which bend) and extensors (which stretch), and nerves from the cervical spine control both sensation and movement. Blood vessels and tendons run along the entire arm, supplying each part with oxygen and nutrients. The nails, especially on the fingers, serve as protection and tools for sensation and precision. In summary, our arms are central to how we interact with our surroundings.