The sheet of muscular tissue in the thoracic cavity is called ___ .
Diaphragm arches up and down during the process of exhalation and inhalation respectively.
The muscular sheet that forms the floor of the thoracic cavity is known as ______ .
Statement 1: Diaphragm is a muscular wall. Statement 2: Diaphragm separates the thoracic and abdominal cavities.