The diaphragm is a dome-shaped muscle that separates the chest from the abdomen. This muscle, also called the thoracic diaphragm, is the main muscle used for breathing and is also involved in other ...

The abdominal aorta begins after the aorta passes through a muscle called the diaphragm, at the level of the twelfth thoracic vertebra (a spot in the upper abdomen). From there, it travels downward, ...