The conus arteriosus is part of which heart chamber?

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Study for the NBME Gross Anatomy High Yield Test. Enhance your learning with flashcards and multiple-choice questions, each detailed with hints and explanations. Prepare effectively for your anatomy exam!

Multiple Choice

The conus arteriosus is part of which heart chamber?

Explanation:
The conus arteriosus is the smooth-walled outflow portion of the right ventricle that leads into the pulmonary trunk. It marks the transition from the trabeculated, inflow part of the right ventricle to the pulmonary valve, and is continuous with the infundibulum. Because it is part of the right ventricular outflow tract, the correct chamber is the right ventricle. The left-sided outflow tract ends at the aortic valve and is not called conus arteriosus, and the atria are not involved in this outflow pathway.

The conus arteriosus is the smooth-walled outflow portion of the right ventricle that leads into the pulmonary trunk. It marks the transition from the trabeculated, inflow part of the right ventricle to the pulmonary valve, and is continuous with the infundibulum. Because it is part of the right ventricular outflow tract, the correct chamber is the right ventricle. The left-sided outflow tract ends at the aortic valve and is not called conus arteriosus, and the atria are not involved in this outflow pathway.

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