The term "upper limbs" refers to the paired structures of the human body that include the arms, shoulders, and hands. Each upper limb consists of bones, muscles, tendons, and nerves that work together to allow a wide range of movements. The main bones in the upper limb are the humerus, radius, and ulna, which connect the shoulder to the elbow and wrist. Upper limbs play a crucial role in daily activities such as reaching, lifting, and manipulating objects. They are essential for tasks that require fine motor skills, like writing or using tools. The shoulder joint provides a high degree of mobility, while the elbow joint allows for bending and straightening the arm.