2. Diaphragm
• Dome shaped thin
musculotendinous partition
between thorax and abdomen
• Most imp muscle of respiration.
• Pierced by structures that pass
between chest and abdomen.
4. Developmental Components
Components Origin
Central tendon Septum transversum
Right & Left crura Dorsal mesentery of esophagus
Peripheral posterolateral part Mesoderm of lateral body wall
Small peripheral part Pleuroperitoneal membranes
Mesodermal in origin