The pulmonary trunk is the main arterial vessel of the pulmonary circulation, arising from the right ventricle before bifurcating into the left and right pulmonary arteries.
Carries deoxygenated blood pumped by the right ventricle to the lungs for carbon dioxide removal and oxygen replenishment.
Middle and superior mediastinum of the thoracic cavity, ascending obliquely from the right ventricular outflow tract anterior to the ascending aorta.
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The heart provides the muscular pumping force that drives blood into the pulmonary trunk and ascending aorta.
After arterial blood perfuses capillary beds in tissues, the venous system collects and returns the blood back toward the heart.
In the pulmonary circuit, arteries carry blood from the right side of the heart to the lungs where oxygen is replenished.