The infundibulum is part of which anatomical structure in the heart?

The infundibulum, also known as the conus arteriosus, is a funnel-shaped structure located at the outflow tract of the right ventricle. Its primary function is to direct blood from the right ventricle into the pulmonary artery during ventricular systole. This area is crucial for the efficient outflow of deoxygenated blood toward the lungs for oxygenation.

While other parts of the heart, such as the left ventricle outflow tract or structures like the pulmonary veins and coronary sinus, play important roles in the circulatory system, they do not contain the infundibulum. The left ventricle outflow tract leads blood into the aorta, the pulmonary veins carry oxygenated blood from the lungs to the left atrium, and the coronary sinus is responsible for draining deoxygenated blood from the heart muscle itself. Thus, identifying the infundibulum as a component of the right ventricle outflow tract is key in understanding its location and function within the heart's anatomy.