Pulmonary trunk

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Heart of a dog from the left: 1 left ventricle, 2 left longitudinal furrows ( sulcus interventricularis paraconalis ), 3 right ventricle, 4 arterial cones ( Conus arteriosus ), 5 pulmonary trunk ( Truncus pulmonalis ), 6 BOTALLI ligament ( Ligamentum arteriosum ), 7 aortic arch, 8 Arm-head trunk ( Truncus brachiocephalicus ), 9 left subclavian artery ( Arteria subclavia sinistra ), 10 right atrial appendage, 11 left atrial appendage, 12 coronary furrows with fat, 13 pulmonary veins.

The pulmonary trunk ( Latin for "lung trunk ") is an elastic artery close to the heart and the common trunk of the arteries leading to the lungs ( arteriae pulmonales ), which transport oxygen-poor blood . The blood vessel begins with a slight swelling ( conus arteriosus ) in the right ventricle . The pulmonary valve ( Valva trunci pulmonalis ) is located inside the initial section .

The trunk bends caudally and crosses past the aorta on the left . Here both vessels are connected by the arterial ligament (Botalli's ligament), a strand of connective tissue . The ligamentum arteriosum represents the former ductus arteriosus , which normally closes immediately after birth and which in the fetus conducts the blood from the pulmonary trunk into the aorta and thus largely shortens the pulmonary circulation .

Then the pulmonary trunk divides into the right and left pulmonary arteries ( arteria pulmonalis dextra and sinistra ) at the bifurcatio trunci pulmonalis .


  • Theodor H. Schiebler (Ed.): Anatomie. Histology, history of development, macroscopic and microscopic anatomy, topography. Taking into account the item catalog. 9th, completely revised edition. Springer, Heidelberg 2005, ISBN 3-540-21966-8 .
  • Uwe Gille: Cardiovascular and immune system, Angiologia. In: Franz-Viktor Salomon, Hans Geyer, Uwe Gille (Ed.): Anatomy for veterinary medicine. 2nd, revised and expanded edition. Enke, Stuttgart 2008, ISBN 978-3-8304-1075-1 , pp. 404-463.