Final answer:
The valve between the right ventricle and the pulmonary artery is called the pulmonary valve. Its purpose is to prevent blood from flowing back into the right ventricle.
Step-by-step explanation:
The valve that is present between the right ventricle and the pulmonary artery is called the pulmonary valve or the pulmonary semilunar valve. Its purpose is to prevent blood from flowing back from the pulmonary artery into the right ventricle. The pulmonary valve consists of three flaps and allows blood to flow from the right ventricle to the pulmonary artery.