Opening of the pulmonary artery

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Opening of the pulmonary artery
Latin ostium trunci pulmonalis
Gray's p.531

The opening of the pulmonary artery (or trunk) is circular in form, and situated at the summit of the conus arteriosus, close to the ventricular septum.

It is placed above and to the left of the atrioventricular opening[disambiguation needed], and is guarded by the pulmonary semilunar valves.

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This article incorporates text from a public domain edition of Gray's Anatomy.