Definition. Thoracic surgery is the repair of organs located in the thorax, or chest. The thoracic cavity lies between the neck and the diaphragm, and contains the heart and lungs (cardiopulmonary system), the esophagus, trachea, pleura, mediastinum, chest wall, and diaphragm.
If youâre reading this, chances are you switched on a light. But for the 1.3 billion people around the world who lack access to electricity, darkness is a reality. There is no electric light for children to do their homework by, no power to run refrigerators that keep perishables or needed medicine cold, no power for cooking stoves or microwaves.
Frequently Asked Questions. In 2011, total energy use per person (or per capita consumption) in the United States was about 313 million British thermal units (Btu).The world per capita consumption of energy 1 in 2011 was about 75 million Btu.ow much energy does a person use in a year? In 2011, total energy use per person (or per capita consumption) in the United States was about 313 million British thermal units (Btu).