Nokea
Which valve prevents backflow of blood into the left ventricle from the aorta?
Correct Answer: A
Rationale: The correct answer is A: Aortic valve. The aortic valve is located between the left ventricle and the aorta, preventing the backflow of blood into the left ventricle during diastole. This is essential for maintaining proper blood flow direction and preventing regurgitation. The other choices, B: Mitral valve, C: Tricuspid valve, and D: Pulmonary valve, are all located in different areas of the heart and serve different functions. The mitral valve is between the left atrium and ventricle, the tricuspid valve is between the right atrium and ventricle, and the pulmonary valve is between the right ventricle and pulmonary artery. None of these valves are responsible for preventing backflow into the left ventricle from the aorta.