The diaphragm is a thin musculotendinous structure that fills the inferior thoracic aperture and separates the thoracic cavity from the abdominal cavity.
Xiphoid process of sternum; Costal margin of the thoracic wall; Ends of ribs 11 and 12; Ligaments that span across structures of the posterior abdominal wall; Vertebrae of the lumbar region.
From its peripheral attachments, muscle fibers converge to form a central tendon; The pericardium is attached to the middle part of the central tendon.
Phrenic nerves (C3, C4, C5).
Increases the volume of the thorax.