Respuesta :
Answer: mitral valve
Explanation: In mitral valve regurgitation, the valve between the upper left heart chamber (left atrium) and the lower left heart chamber (left ventricle) doesn't close tightly, causing blood to leak backward into the left atrium (regurgitation).
Answer:That’s wrong
The answer is Pulmonary Semilunar Valve
Explanation: Human Anatomy and Physiology