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.
By Ground Up Strength. The muscles that move the hand are divided into two groups, the extrinsic and intrinsic muscles. The extrinsic muscles of the hand are the powerful flexor and extensor muscles of the forearm. These muscles originate outside the hand and insert within the hand. Since they are located and originate on the forearm outside the hand itself, they are called extrinsic which comes from the Latin word extrinsecus meaning on the outside.