One of the reasons Britain became rich was because the Industrial Revolution (factories and such) got off the ground there sooner. Britain had a large navy, and many colonies in other parts of the world, such as India, and Rhodesia.
Full Muscles of the Arm and Hand Description. The muscles of the upper arm are responsible for the flexion and extension of the forearm at the elbow joint. Flexion of the forearm is achieved by a group of three muscles â the brachialis, biceps brachii, and brachioradialis.uscles of the Arm and Hand. The muscles of the arm and hand are specifically designed to meet the bodyâs diverse needs of strength, speed, and precision while completing many complex daily tasks.
The hip flexors (psoas) are the most important muscle for hip flexion (moving your leg forward). The most important muscle for extending your hip (moving your leg back) is the gluteus maximus. Both of these muscles obviously attach high on the hip and control the femur bone (upper thigh).