Braços

Braços are the upper limbs of vertebrate animals that connect the torso to the hands. In humans, each arm consists of the humerus, radius, ulna, and a complex arrangement of muscles, nerves, tendons, and ligaments. The shoulder joint, also known as the glenohumeral joint, is a ball‑and‑socket joint that allows a wide range of motion. Below the elbow, the forearm houses the radius and ulna bones; the wrist, comprised of the carpal bones, forms the end of the forearm and supports hand movement.

The primary functions of the human arm include lifting, carrying, pushing, pulling, and manipulating objects. The deltoid, biceps brachii, triceps brachii, and forearm flexor and extensor muscles provide power and precision. Fine motor control is facilitated by the numerous muscles acting in the wrist and fingers. The brachial plexus supplies the arm with motor and sensory nerves, enabling coordinated movement and sensation.

Medical conditions affecting the arm include fractures, dislocations, nerve compression syndromes such as carpal tunnel syndrome, and tendonitis. Rehabilitation often involves physiotherapy to restore range of motion and strength.

Culturally, the arm can symbolize strength, support, or empathy. In many traditions, arm gestures and arm–length measurements have been used in art, prayer, and ritual. In sports, a strong arm contributes to performance in disciplines such as baseball, darts, and handball. The study of arm anatomy and biomechanics remains a critical component of orthopaedics, physical therapy, and ergonomic design.