Final answer:
The pulmonary valve is the valve that regulates the flow of blood between the right ventricle and the vessels leading to the lungs. It is also known as the pulmonic valve or the right semilunar valve.
Step-by-step explanation:
The pulmonary valve regulates the flow of blood between the right ventricle and the vessels leading to the lungs. It is also known as the pulmonic valve or the right semilunar valve. When the ventricle relaxes, the pressure differential causes blood to flow back into the ventricle from the pulmonary trunk. This flow of blood fills the pocket-like flaps of the pulmonary valve, causing the valve to close and producing an audible sound.