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. How is electricity used in U.S. homes? The U.S. Energy Information Administration (EIA) estimates in the Annual Energy Outlook 2017 that about 1,410 billion kilowatthours (kWh) of electricity were used by the residential sector in the United States in 2016. 1 Includes televisions, set-top boxes, home theater systems, DVD players, and video game consoles.