The upper limb consists of the shoulder, arm, forearm, and hand. It includes bones such as the humerus, radius, and ulna, which provide structure and support. The shoulder joint allows for a wide range of motion, while the elbow joint connects the arm and forearm, enabling bending and straightening. Muscles in the upper limb, like the biceps and triceps, facilitate movement. The nerves, including the median and ulnar nerves, control muscle function and sensation. Blood supply is provided by the brachial artery, which branches into smaller arteries to nourish the arm and hand.