| Front | Thoracic diaphragm |
|---|---|
| Back | Structure: muscle that attaches to the structures of the thoracic outlet (xiphoid process, T7-T12 ribs and costal cartilages, lumbar vertebral bodies). a) centrally, muscle fibers attach to the fibrous central tendon of the diaphragm. b) right dome is higher and covers the liver c) left dome is lower and covers the stomach Innervation: phrenic nerve (arising from C3-5) Function: 1. Contracts and descends to increase thoracic volume - changes pressure and allows for inhalation. 2. Rhythmic movements assist venous and lymph return to the heart 3. Pericardial attachment to central tendon causes heart to rise and fall with breathing. |
Tags: muscles
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