What is a pulmonary outflow tract?

The pulmonary outflow tract is the portion of the right ventricle of the heart that leads to the pulmonary artery. It is formed by the infundibulum, which is the muscular cone-shaped structure that connects the right ventricle to the pulmonary artery, and the pulmonary valve, which is a one-way valve that prevents blood from flowing back into the right ventricle. The pulmonary outflow tract is responsible for delivering deoxygenated blood from the right ventricle to the lungs, where it is oxygenated and then returned to the left ventricle of the heart.