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.
Movements of the Upper Limb - Page 6 of 18. Adduction of the arm is also called adduction of/at the shoulder. This motion can be divided into two motions: downward rotation of the scapula and true adduction of the arm at the shoulder. Muscles: pectoralis major and minor, latissimus dorsi, teres major, gravity (depending on body position), and even the lowest fibers of the deltoid (making deltoid its own antagonist)