Topics: Upper Limb, Pectoral Region, axilla, armpit, Scapular Region, shoulder joint, Cutaneous Innervation, Venous Drainage, lymphatic drainage, arm, Elbow, Radio-ulnar Joints, hand, Thoracic Cage, thorax, Thoracic Wall, pleural cavities, lungs, Mediastinum, Pericardium, Heart, Superior Vena Cava, Aorta, Pulmonary Trunk, Thymus, Trachea, Esophagus, Thoracic Duct, Azygos Veins, Hemiazygos Veins, Thoracic Sympathetic Trunks