The diaphragm is the most important respiratory muscle and separates the chest cavity from the abdomen.

Figure diaphragm

Figure Hull seen from the side with skeleton, diaphragm and visceral spaces (A) and diaphragm and viscus spaces from the front (B)
  1. Diaphragm (red) -
  2. Chest cavity -
    Cavitas thoracis
  3. Abdominal cavity -
    Cavitas abdominis
  4. Tendon center of
    Diaphragm -
    Centrum tendineum
  5. Rib part of the diaphragm -
    Pars costalis diaphragmatis
  6. Esophageal slit -
    Hiatus aortic
  7. Vena cava hole -
    Foramen venae cavae
  8. Aorta in the aortic slot -
    Aorta in the hiatus aorticus
  9. Lumbar part of the diaphragm -
    Pars lumbalis diaphragmatis
  10. Lungs - Pulmo
    The diaphragm separates
    the thoracic and abdominal cavities

Arterial care

The arterial supply (vascular supply diaphragm) is complex and takes place over four different branches, which branch out strongly. These are, first, the superior diaphragmatic arteries ( superior phrenic arteries ), the pericardiac pericardial artery ( AERP ), and the musculo-pulmonary artery ( Arteria musculophrenica ), all of which originate from the thoracic aorta ( aorta thoracica ). The further arterial supply takes place via the lower diaphragmatic arteries ( Arteriae phrenicae inferiores ), which comes from the abdominal aorta ( aorta abdominalis ) (vascular supply diaphragm).

Venous drain

Venous drainage takes place via veins of the same name into the superior vena cava ( superior vena cava ). Only the lower diaphragmatic veins ( inferior vein pore ) opens into the inferior vena cava ( vena cava inferior ) (vascular supply diaphragm).

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