Emergency Medical Technician (EMT) Intermediate Practice Exam 2026 – 400 Free Practice Questions to Pass the Exam

The primary function of the aortic valve is to regulate the flow of blood from the left ventricle to the systemic circulation. This valve acts as a gateway, allowing oxygen-rich blood to exit the heart and enter the aorta, which is the main artery responsible for distributing blood to the rest of the body. When the left ventricle contracts during systole, the aortic valve opens to permit the blood to flow out. Once the ventricle relaxes, the valve closes to prevent any backflow of blood into the heart. This essential function of the aortic valve ensures that the body's organs and tissues receive the oxygenated blood they need to function effectively.