Singapore Singapore is no# 10 on the list with an average internet speed of 30.7 megabits per second. It made it on the list of the top ten with a peak speed that is almost double the global average of 15.9 megabits per second.
Structure [edit]. The diaphragm is a dome-shaped structure of muscle and fibrous tissue that separates the thoracic cavity from the abdomen. The dome curves upwards. The superior surface of the dome forms the floor of the thoracic cavity, and the inferior surface the roof of the abdominal cavity. As a dome, the diaphragm has peripheral attachments to structures that make up the abdominal and chest walls.
Gross anatomy. The anterior division of the twelfth thoracic nerve, called the subcostal nerve, is larger than the other intercostal nerves. It runs along the lower border of the twelfth rib. It may give off a communicating branch to the first lumbar nerve and the iliohypogastric nerve.he subcostal nerve can also be considered as the twelfth intercostal nerve. Some authors describe it as the first branch of the lumbar plexus.