Pulmonary trunk (Truncus pulmonalis)
Educational content only — not medical advice.
Anatomy
Carries deoxygenated blood from the right ventricle, dividing beneath the aortic arch into the right and left pulmonary arteries; the ligamentum arteriosum — remnant of the foetal duct — ties it to the arch.
Clinical notes
A persistently open ductus gives the continuous machinery murmur; primary pulmonary hypertension reverses flow through it, producing central cyanosis (Eisenmenger).
Related structures
Educational references
FAQ
What is the role of the Pulmonary trunk?
Carries deoxygenated blood from the right ventricle, dividing beneath the aortic arch into the right and left pulmonary arteries; the ligamentum arteriosum — remnant of the foetal duct — ties it to the arch.
Why is the Pulmonary trunk clinically important?
A persistently open ductus gives the continuous machinery murmur; primary pulmonary hypertension reverses flow through it, producing central cyanosis (Eisenmenger).
Source & license
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