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.
Electricity: How it Changed the. World Electricity has existed ever since the beginning of time. Over the years, we have learned how to use this source to our advantages, and using this type of energy has changed the way we live forever.No human has actually invented electricity. Electricity has been part of the world ever since it was first created.lectricity: How it Changed the World Forever. Electricity existed ever since the world was created. It has been part of this world for a long time, and over time, we have been able to use it to our advantage. Electricity changes the way we live and has changed the world forever.