11. It is closed by the diaphragm, which separates the thoracic cavity from the abdominal cavity. 12. When breathing, downward motion of the thoracic diaphragm creates negative pressure in the thoracic cavity . 13. Strings go p-ling in my thoracic cavity . 14. The thoracic cavity expands and air rushes into the lungs due to the negative pressure, producing inspiration. 15. The thoracic outlet is the lower opening of the thoracic cavity whose edges are the lowest ribs. 16. For example, because of the smaller distance in the thoracic cavity between the sternum and anteroposterior axis. 17. During inspiration, the negative pressure in the thoracic cavity will cause increased pressure into the right ventricle. 18. It has been hypothesized that both reach the brain from the thoracic cavity via major blood vessels. 19. When the diaphragm contracts, the thoracic cavity is expanded, reducing intra-thoracic pressure and drawing air into the lungs. 20. The larynx is one half the length of the vertebral column and fills out most of the thoracic cavity .
